79921475 has 6 divisors (see below), whose sum is σ = 99102660. Its totient is φ = 63937160.

The previous prime is 79921453. The next prime is 79921487. The reversal of 79921475 is 57412997.

It is not a de Polignac number, because 79921475 - 2⁶ = 79921411 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1598405 + ... + 1598454.

It is an arithmetic number, because the mean of its divisors is an integer number (16517110).

Almost surely, 2^79921475 is an apocalyptic number.

79921475 is a deficient number, since it is larger than the sum of its proper divisors (19181185).

79921475 is a wasteful number, since it uses less digits than its factorization.

79921475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196869 (or 3196864 counting only the distinct ones).

The product of its digits is 158760, while the sum is 44.

The square root of 79921475 is about 8939.8811513353. The cubic root of 79921475 is about 430.7459110340.

The spelling of 79921475 in words is "seventy-nine million, nine hundred twenty-one thousand, four hundred seventy-five".