79899555 has 16 divisors (see below), whose sum is σ = 131963904. Its totient is φ = 41238240.

The previous prime is 79899551. The next prime is 79899557. The reversal of 79899555 is 55599897.

It is not a de Polignac number, because 79899555 - 2² = 79899551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79899495 and 79899504.

It is not an unprimeable number, because it can be changed into a prime (79899551) 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, 85449 + ... + 86378.

It is an arithmetic number, because the mean of its divisors is an integer number (8247744).

Almost surely, 2^79899555 is an apocalyptic number.

79899555 is a deficient number, since it is larger than the sum of its proper divisors (52064349).

79899555 is a wasteful number, since it uses less digits than its factorization.

79899555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171866.

The product of its digits is 5103000, while the sum is 57.

The square root of 79899555 is about 8938.6551001815. The cubic root of 79899555 is about 430.7065273193.

The spelling of 79899555 in words is "seventy-nine million, eight hundred ninety-nine thousand, five hundred fifty-five".