77311867 has 2 divisors, whose sum is σ = 77311868. Its totient is φ = 77311866.

The previous prime is 77311837. The next prime is 77311873. The reversal of 77311867 is 76811377.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77311867 - 2⁷ = 77311739 is a prime.

It is not a weakly prime, because it can be changed into another prime (77311837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38655933 + 38655934.

It is an arithmetic number, because the mean of its divisors is an integer number (38655934).

Almost surely, 2^77311867 is an apocalyptic number.

77311867 is a deficient number, since it is larger than the sum of its proper divisors (1).

77311867 is an equidigital number, since it uses as much as digits as its factorization.

77311867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 40.

The square root of 77311867 is about 8792.7167019073. The cubic root of 77311867 is about 426.0056774428.

The spelling of 77311867 in words is "seventy-seven million, three hundred eleven thousand, eight hundred sixty-seven".