79279515 has 48 divisors (see below), whose sum is σ = 158558400. Its totient is φ = 35894016.

The previous prime is 79279513. The next prime is 79279561. The reversal of 79279515 is 51597297.

It is not a de Polignac number, because 79279515 - 2¹ = 79279513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (79279513) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33181 + ... + 35489.

It is an arithmetic number, because the mean of its divisors is an integer number (3303300).

Almost surely, 2^79279515 is an apocalyptic number.

79279515 is a deficient number, since it is larger than the sum of its proper divisors (79278885).

79279515 is a wasteful number, since it uses less digits than its factorization.

79279515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436 (or 2433 counting only the distinct ones).

The product of its digits is 198450, while the sum is 45.

The square root of 79279515 is about 8903.9044806197. The cubic root of 79279515 is about 429.5895036864.

The spelling of 79279515 in words is "seventy-nine million, two hundred seventy-nine thousand, five hundred fifteen".