77364631 has 4 divisors (see below), whose sum is σ = 77420200. Its totient is φ = 77309064.

The previous prime is 77364607. The next prime is 77364647. The reversal of 77364631 is 13646377.

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 77364631 - 2⁷ = 77364503 is a prime.

It is a super-2 number, since 2×77364631² = 11970572259532322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77364601) 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, 25641 + ... + 28498.

It is an arithmetic number, because the mean of its divisors is an integer number (19355050).

Almost surely, 2^77364631 is an apocalyptic number.

77364631 is a deficient number, since it is larger than the sum of its proper divisors (55569).

77364631 is a wasteful number, since it uses less digits than its factorization.

77364631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55568.

The product of its digits is 63504, while the sum is 37.

The square root of 77364631 is about 8795.7166279957. The cubic root of 77364631 is about 426.1025692172.

The spelling of 77364631 in words is "seventy-seven million, three hundred sixty-four thousand, six hundred thirty-one".