79893915 has 16 divisors (see below), whose sum is σ = 131286048. Its totient is φ = 41458176.

The previous prime is 79893911. The next prime is 79893959. The reversal of 79893915 is 51939897.

It is a happy number.

It is not a de Polignac number, because 79893915 - 2² = 79893911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79893911) 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, 71422 + ... + 72531.

It is an arithmetic number, because the mean of its divisors is an integer number (8205378).

Almost surely, 2^79893915 is an apocalyptic number.

79893915 is a deficient number, since it is larger than the sum of its proper divisors (51392133).

79893915 is a wasteful number, since it uses less digits than its factorization.

79893915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143998.

The product of its digits is 612360, while the sum is 51.

The square root of 79893915 is about 8938.3396109121. The cubic root of 79893915 is about 430.6963927532.

It can be divided in two parts, 79893 and 915, that added together give a palindrome (80808).

The spelling of 79893915 in words is "seventy-nine million, eight hundred ninety-three thousand, nine hundred fifteen".