79536021 has 4 divisors (see below), whose sum is σ = 106048032. Its totient is φ = 53024012.

The previous prime is 79536019. The next prime is 79536031. The reversal of 79536021 is 12063597.

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 a cyclic number.

It is not a de Polignac number, because 79536021 - 2¹ = 79536019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79536011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13256001 + ... + 13256006.

It is an arithmetic number, because the mean of its divisors is an integer number (26512008).

Almost surely, 2^79536021 is an apocalyptic number.

It is an amenable number.

79536021 is a deficient number, since it is larger than the sum of its proper divisors (26512011).

79536021 is a wasteful number, since it uses less digits than its factorization.

79536021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26512010.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 79536021 is about 8918.2969786838. The cubic root of 79536021 is about 430.0523120060.

The spelling of 79536021 in words is "seventy-nine million, five hundred thirty-six thousand, twenty-one".