79921527 has 16 divisors (see below), whose sum is σ = 127080960. Its totient is φ = 43683552.

The previous prime is 79921507. The next prime is 79921559. The reversal of 79921527 is 72512997.

It is not a de Polignac number, because 79921527 - 2⁷ = 79921399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79921507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82252 + ... + 83217.

It is an arithmetic number, because the mean of its divisors is an integer number (7942560).

Almost surely, 2^79921527 is an apocalyptic number.

79921527 is a deficient number, since it is larger than the sum of its proper divisors (47159433).

79921527 is a wasteful number, since it uses less digits than its factorization.

79921527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165502.

The product of its digits is 79380, while the sum is 42.

The square root of 79921527 is about 8939.8840596509. The cubic root of 79921527 is about 430.7460044540.

The spelling of 79921527 in words is "seventy-nine million, nine hundred twenty-one thousand, five hundred twenty-seven".