78513297 has 16 divisors (see below), whose sum is σ = 110986752. Its totient is φ = 49282560.

The previous prime is 78513289. The next prime is 78513343. The reversal of 78513297 is 79231587.

It is not a de Polignac number, because 78513297 - 2³ = 78513289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78513257) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7968 + ... + 14849.

It is an arithmetic number, because the mean of its divisors is an integer number (6936672).

Almost surely, 2^78513297 is an apocalyptic number.

It is an amenable number.

78513297 is a deficient number, since it is larger than the sum of its proper divisors (32473455).

78513297 is a wasteful number, since it uses less digits than its factorization.

78513297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22888.

The product of its digits is 105840, while the sum is 42.

The square root of 78513297 is about 8860.7729346824. The cubic root of 78513297 is about 428.2010602925.

The spelling of 78513297 in words is "seventy-eight million, five hundred thirteen thousand, two hundred ninety-seven".