79442369 has 4 divisors (see below), whose sum is σ = 80628144. Its totient is φ = 78256596.

The previous prime is 79442357. The next prime is 79442387. The reversal of 79442369 is 96324497.

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 an emirpimes, since its reverse is a distinct semiprime: 96324497 = 173 ⋅556789.

It is a cyclic number.

It is not a de Polignac number, because 79442369 - 2²⁰ = 78393793 is a prime.

It is a super-2 number, since 2×79442369² = 12622179984664322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79442399) 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, 592787 + ... + 592920.

It is an arithmetic number, because the mean of its divisors is an integer number (20157036).

Almost surely, 2^79442369 is an apocalyptic number.

It is an amenable number.

79442369 is a deficient number, since it is larger than the sum of its proper divisors (1185775).

79442369 is a wasteful number, since it uses less digits than its factorization.

79442369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185774.

The product of its digits is 326592, while the sum is 44.

The square root of 79442369 is about 8913.0448781547. The cubic root of 79442369 is about 429.8834531806.

The spelling of 79442369 in words is "seventy-nine million, four hundred forty-two thousand, three hundred sixty-nine".