77922907 has 2 divisors, whose sum is σ = 77922908. Its totient is φ = 77922906.

The previous prime is 77922881. The next prime is 77922931. The reversal of 77922907 is 70922977.

It is a strong prime.

It is an emirp because it is prime and its reverse (70922977) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77922907 is a prime.

It is not a weakly prime, because it can be changed into another prime (77922967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38961453 + 38961454.

It is an arithmetic number, because the mean of its divisors is an integer number (38961454).

Almost surely, 2^77922907 is an apocalyptic number.

77922907 is a deficient number, since it is larger than the sum of its proper divisors (1).

77922907 is an equidigital number, since it uses as much as digits as its factorization.

77922907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 111132, while the sum is 43.

The square root of 77922907 is about 8827.3952556799. The cubic root of 77922907 is about 427.1250559236.

The spelling of 77922907 in words is "seventy-seven million, nine hundred twenty-two thousand, nine hundred seven".