79928587 has 2 divisors, whose sum is σ = 79928588. Its totient is φ = 79928586.

The previous prime is 79928579. The next prime is 79928599. The reversal of 79928587 is 78582997.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79928587 - 2³ = 79928579 is a prime.

It is not a weakly prime, because it can be changed into another prime (79928567) 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 as a sum of consecutive naturals, namely, 39964293 + 39964294.

It is an arithmetic number, because the mean of its divisors is an integer number (39964294).

Almost surely, 2^79928587 is an apocalyptic number.

79928587 is a deficient number, since it is larger than the sum of its proper divisors (1).

79928587 is an equidigital number, since it uses as much as digits as its factorization.

79928587 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 55.

The square root of 79928587 is about 8940.2789106381. The cubic root of 79928587 is about 430.7586876336.

The spelling of 79928587 in words is "seventy-nine million, nine hundred twenty-eight thousand, five hundred eighty-seven".