77900523 has 4 divisors (see below), whose sum is σ = 103867368. Its totient is φ = 51933680.

The previous prime is 77900509. The next prime is 77900527. The reversal of 77900523 is 32500977.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32500977 = 3 ⋅10833659.

It is a cyclic number.

It is not a de Polignac number, because 77900523 - 2⁵ = 77900491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77900527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12983418 + ... + 12983423.

It is an arithmetic number, because the mean of its divisors is an integer number (25966842).

Almost surely, 2^77900523 is an apocalyptic number.

77900523 is a deficient number, since it is larger than the sum of its proper divisors (25966845).

77900523 is a wasteful number, since it uses less digits than its factorization.

77900523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25966844.

The product of its (nonzero) digits is 13230, while the sum is 33.

The square root of 77900523 is about 8826.1272934396. The cubic root of 77900523 is about 427.0841536043.

The spelling of 77900523 in words is "seventy-seven million, nine hundred thousand, five hundred twenty-three".