77956927 has 2 divisors, whose sum is σ = 77956928. Its totient is φ = 77956926.

The previous prime is 77956903. The next prime is 77956933. The reversal of 77956927 is 72965977.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77956927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77956997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38978463 + 38978464.

It is an arithmetic number, because the mean of its divisors is an integer number (38978464).

Almost surely, 2^77956927 is an apocalyptic number.

77956927 is a deficient number, since it is larger than the sum of its proper divisors (1).

77956927 is an equidigital number, since it uses as much as digits as its factorization.

77956927 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1666980, while the sum is 52.

The square root of 77956927 is about 8829.3220011505. The cubic root of 77956927 is about 427.1872057280.

The spelling of 77956927 in words is "seventy-seven million, nine hundred fifty-six thousand, nine hundred twenty-seven".