79139469 has 4 divisors (see below), whose sum is σ = 105519296. Its totient is φ = 52759644.

The previous prime is 79139453. The next prime is 79139483. The reversal of 79139469 is 96493197.

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.

It is not a de Polignac number, because 79139469 - 2⁴ = 79139453 is a prime.

It is a super-2 number, since 2×79139469² = 12526111107203922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79139429) 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, 13189909 + ... + 13189914.

It is an arithmetic number, because the mean of its divisors is an integer number (26379824).

Almost surely, 2^79139469 is an apocalyptic number.

It is an amenable number.

79139469 is a deficient number, since it is larger than the sum of its proper divisors (26379827).

79139469 is a wasteful number, since it uses less digits than its factorization.

79139469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26379826.

The product of its digits is 367416, while the sum is 48.

The square root of 79139469 is about 8896.0367018128. The cubic root of 79139469 is about 429.3364002558.

The spelling of 79139469 in words is "seventy-nine million, one hundred thirty-nine thousand, four hundred sixty-nine".