78032313 has 6 divisors (see below), whose sum is σ = 112713354. Its totient is φ = 52021536.

The previous prime is 78032309. The next prime is 78032321. The reversal of 78032313 is 31323087.

It can be written as a sum of positive squares in only one way, i.e., 60793209 + 17239104 = 7797^2 + 4152^2 .

It is not a de Polignac number, because 78032313 - 2² = 78032309 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78032303) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4335120 + ... + 4335137.

It is an arithmetic number, because the mean of its divisors is an integer number (18785559).

Almost surely, 2^78032313 is an apocalyptic number.

It is an amenable number.

78032313 is a deficient number, since it is larger than the sum of its proper divisors (34681041).

78032313 is a wasteful number, since it uses less digits than its factorization.

78032313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8670263 (or 8670260 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 78032313 is about 8833.5900402951. The cubic root of 78032313 is about 427.3248610584.

The spelling of 78032313 in words is "seventy-eight million, thirty-two thousand, three hundred thirteen".