77964531 has 4 divisors (see below), whose sum is σ = 103952712. Its totient is φ = 51976352.

The previous prime is 77964529. The next prime is 77964541. The reversal of 77964531 is 13546977.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77964531 - 2¹ = 77964529 is a prime.

It is a super-2 number, since 2×77964531² = 12156936188099922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (77964521) 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, 12994086 + ... + 12994091.

It is an arithmetic number, because the mean of its divisors is an integer number (25988178).

Almost surely, 2^77964531 is an apocalyptic number.

77964531 is a deficient number, since it is larger than the sum of its proper divisors (25988181).

77964531 is a wasteful number, since it uses less digits than its factorization.

77964531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25988180.

The product of its digits is 158760, while the sum is 42.

The square root of 77964531 is about 8829.7526012907. The cubic root of 77964531 is about 427.2010947050.

The spelling of 77964531 in words is "seventy-seven million, nine hundred sixty-four thousand, five hundred thirty-one".