79742813369 has 4 divisors (see below), whose sum is σ = 79743654144. Its totient is φ = 79741972596.

The previous prime is 79742813329. The next prime is 79742813387. The reversal of 79742813369 is 96331824797.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 96331824797 = 13 ⋅7410140369.

It is a cyclic number.

It is not a de Polignac number, because 79742813369 - 2¹² = 79742809273 is a prime.

It is a super-2 number, since 2×79742813369² (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 (79742813329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256937 + ... + 474870.

It is an arithmetic number, because the mean of its divisors is an integer number (19935913536).

Almost surely, 2^79742813369 is an apocalyptic number.

It is an amenable number.

79742813369 is a deficient number, since it is larger than the sum of its proper divisors (840775).

79742813369 is a wasteful number, since it uses less digits than its factorization.

79742813369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840774.

The product of its digits is 13716864, while the sum is 59.

The spelling of 79742813369 in words is "seventy-nine billion, seven hundred forty-two million, eight hundred thirteen thousand, three hundred sixty-nine".