1420894992169 has 3 divisors (see below), whose sum is σ = 1420896184183. Its totient is φ = 1420893800156.

The previous prime is 1420894992091. The next prime is 1420894992173. The reversal of 1420894992169 is 9612994980241.

The square root of 1420894992169 is 1192013.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1281774944025 + 139120048144 = 1132155^2 + 372988^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1420894992169 is a prime.

It is a super-2 number, since 2×1420894992169² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1420894992169.

It is not an unprimeable number, because it can be changed into a prime (1420894999169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 596007 + ... + 1788019.

Almost surely, 2^{1420894992169} is an apocalyptic number.

1420894992169 is the 1192013-rd square number.

1420894992169 is the 596007-th centered octagonal number.

It is an amenable number.

1420894992169 is a deficient number, since it is larger than the sum of its proper divisors (1192014).

1420894992169 is an frugal number, since it uses more digits than its factorization.

1420894992169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384026 (or 1192013 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 64.

Multiplying 1420894992169 by its sum of digits (64), we get a square (90937279498816 = 9536104²).

The spelling of 1420894992169 in words is "one trillion, four hundred twenty billion, eight hundred ninety-four million, nine hundred ninety-two thousand, one hundred sixty-nine".