494227278169 has 3 divisors (see below), whose sum is σ = 494227981183. Its totient is φ = 494226575156.

The previous prime is 494227278143. The next prime is 494227278191. The reversal of 494227278169 is 961872722494.

The square root of 494227278169 is 703013.

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., 107606961225 + 386620316944 = 328035^2 + 621788^2 .

It is not a de Polignac number, because 494227278169 - 2²¹ = 494225181017 is a prime.

It is a super-2 number, since 2×494227278169² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494227278119) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 351507 + ... + 1054519.

Almost surely, 2^494227278169 is an apocalyptic number.

494227278169 is the 703013-rd square number.

494227278169 is the 351507-th centered octagonal number.

It is an amenable number.

494227278169 is a deficient number, since it is larger than the sum of its proper divisors (703014).

494227278169 is an frugal number, since it uses more digits than its factorization.

494227278169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406026 (or 703013 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 61.

The spelling of 494227278169 in words is "four hundred ninety-four billion, two hundred twenty-seven million, two hundred seventy-eight thousand, one hundred sixty-nine".