77072315 has 4 divisors (see below), whose sum is σ = 92486784. Its totient is φ = 61657848.

The previous prime is 77072269. The next prime is 77072323. The reversal of 77072315 is 51327077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51327077 = 6133 ⋅8369.

It is a cyclic number.

It is not a de Polignac number, because 77072315 - 2⁸ = 77072059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 7707227 + ... + 7707236.

It is an arithmetic number, because the mean of its divisors is an integer number (23121696).

Almost surely, 2^77072315 is an apocalyptic number.

77072315 is a deficient number, since it is larger than the sum of its proper divisors (15414469).

77072315 is a wasteful number, since it uses less digits than its factorization.

77072315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15414468.

The product of its (nonzero) digits is 10290, while the sum is 32.

The square root of 77072315 is about 8779.0839499346. The cubic root of 77072315 is about 425.5652271837.

The spelling of 77072315 in words is "seventy-seven million, seventy-two thousand, three hundred fifteen".