77813275 has 12 divisors (see below), whose sum is σ = 98310672. Its totient is φ = 61075040.

The previous prime is 77813261. The next prime is 77813279. The reversal of 77813275 is 57231877.

It is not a de Polignac number, because 77813275 - 2⁵ = 77813243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77813279) 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 11 ways as a sum of consecutive naturals, for example, 28039 + ... + 30688.

It is an arithmetic number, because the mean of its divisors is an integer number (8192556).

Almost surely, 2^77813275 is an apocalyptic number.

77813275 is a deficient number, since it is larger than the sum of its proper divisors (20497397).

77813275 is a wasteful number, since it uses less digits than its factorization.

77813275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58790 (or 58785 counting only the distinct ones).

The product of its digits is 82320, while the sum is 40.

The square root of 77813275 is about 8821.1833106449. The cubic root of 77813275 is about 426.9246503618.

The spelling of 77813275 in words is "seventy-seven million, eight hundred thirteen thousand, two hundred seventy-five".