77922631 has 2 divisors, whose sum is σ = 77922632. Its totient is φ = 77922630.

The previous prime is 77922619. The next prime is 77922659. The reversal of 77922631 is 13622977.

It is a weak prime.

It is an emirp because it is prime and its reverse (13622977) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77922631 is a prime.

It is a super-2 number, since 2×77922631² = 12143872843924322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77922601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38961315 + 38961316.

It is an arithmetic number, because the mean of its divisors is an integer number (38961316).

Almost surely, 2^77922631 is an apocalyptic number.

77922631 is a deficient number, since it is larger than the sum of its proper divisors (1).

77922631 is an equidigital number, since it uses as much as digits as its factorization.

77922631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 37.

The square root of 77922631 is about 8827.3796225154. The cubic root of 77922631 is about 427.1245516361.

The spelling of 77922631 in words is "seventy-seven million, nine hundred twenty-two thousand, six hundred thirty-one".