1192217220769 has 3 divisors (see below), whose sum is σ = 1192218312657. Its totient is φ = 1192216128882.

The previous prime is 1192217220757. The next prime is 1192217220781. The reversal of 1192217220769 is 9670227122911.

The square root of 1192217220769 is 1091887.

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 is an interprime number because it is at equal distance from previous prime (1192217220757) and next prime (1192217220781).

It is not a de Polignac number, because 1192217220769 - 2⁵ = 1192217220737 is a prime.

It is a super-2 number, since 2×1192217220769² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1192217230769) 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, 545944 + ... + 1637830.

It is an arithmetic number, because the mean of its divisors is an integer number (397406104219).

Almost surely, 2^{1192217220769} is an apocalyptic number.

1192217220769 is the 1091887-th square number.

1192217220769 is the 545944-th centered octagonal number.

It is an amenable number.

1192217220769 is a deficient number, since it is larger than the sum of its proper divisors (1091888).

1192217220769 is an frugal number, since it uses more digits than its factorization.

1192217220769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2183774 (or 1091887 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 49.

Multiplying 1192217220769 by its sum of digits (49), we get a square (58418643817681 = 7643209²).

The spelling of 1192217220769 in words is "one trillion, one hundred ninety-two billion, two hundred seventeen million, two hundred twenty thousand, seven hundred sixty-nine".