79685950369 has 3 divisors (see below), whose sum is σ = 79686232657. Its totient is φ = 79685668082.

The previous prime is 79685950363. The next prime is 79685950417. The reversal of 79685950369 is 96305958697.

It is a happy number.

The square root of 79685950369 is 282287.

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 not a de Polignac number, because 79685950369 - 2³ = 79685950361 is a prime.

It is a super-2 number, since 2×79685950369² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79685950361) 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, 141144 + ... + 423430.

Almost surely, 2^79685950369 is an apocalyptic number.

79685950369 is the 282287-th square number.

79685950369 is the 141144-th centered octagonal number.

It is an amenable number.

79685950369 is a deficient number, since it is larger than the sum of its proper divisors (282288).

79685950369 is an frugal number, since it uses more digits than its factorization.

79685950369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564574 (or 282287 counting only the distinct ones).

The product of its (nonzero) digits is 110224800, while the sum is 67.

The spelling of 79685950369 in words is "seventy-nine billion, six hundred eighty-five million, nine hundred fifty thousand, three hundred sixty-nine".