79546921 has 4 divisors (see below), whose sum is σ = 79834372. Its totient is φ = 79259472.

The previous prime is 79546919. The next prime is 79546937. The reversal of 79546921 is 12964597.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11978521 + 67568400 = 3461^2 + 8220^2 .

It is a cyclic number.

It is not a de Polignac number, because 79546921 - 2¹ = 79546919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79546991) 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, 143310 + ... + 143863.

It is an arithmetic number, because the mean of its divisors is an integer number (19958593).

Almost surely, 2^79546921 is an apocalyptic number.

It is an amenable number.

79546921 is a deficient number, since it is larger than the sum of its proper divisors (287451).

79546921 is a wasteful number, since it uses less digits than its factorization.

79546921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287450.

The product of its digits is 136080, while the sum is 43.

The square root of 79546921 is about 8918.9080609680. The cubic root of 79546921 is about 430.0719565897.

The spelling of 79546921 in words is "seventy-nine million, five hundred forty-six thousand, nine hundred twenty-one".