79689955 has 4 divisors (see below), whose sum is σ = 95627952. Its totient is φ = 63751960.

The previous prime is 79689949. The next prime is 79689959. The reversal of 79689955 is 55998697.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55998697 = 17 ⋅3294041.

It is not a de Polignac number, because 79689955 - 2¹⁵ = 79657187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79689955.

It is not an unprimeable number, because it can be changed into a prime (79689959) 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, 7968991 + ... + 7969000.

It is an arithmetic number, because the mean of its divisors is an integer number (23906988).

Almost surely, 2^79689955 is an apocalyptic number.

79689955 is a deficient number, since it is larger than the sum of its proper divisors (15937997).

79689955 is a wasteful number, since it uses less digits than its factorization.

79689955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15937996.

The product of its digits is 6123600, while the sum is 58.

The square root of 79689955 is about 8926.9230421238. The cubic root of 79689955 is about 430.3295742662.

The spelling of 79689955 in words is "seventy-nine million, six hundred eighty-nine thousand, nine hundred fifty-five".