77874547939 has 2 divisors, whose sum is σ = 77874547940. Its totient is φ = 77874547938.

The previous prime is 77874547889. The next prime is 77874547943. The reversal of 77874547939 is 93974547877.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77874547939 - 2¹⁹ = 77874023651 is a prime.

It is not a weakly prime, because it can be changed into another prime (77874547039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38937273969 + 38937273970.

It is an arithmetic number, because the mean of its divisors is an integer number (38937273970).

Almost surely, 2^77874547939 is an apocalyptic number.

77874547939 is a deficient number, since it is larger than the sum of its proper divisors (1).

77874547939 is an equidigital number, since it uses as much as digits as its factorization.

77874547939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373403520, while the sum is 70.

The spelling of 77874547939 in words is "seventy-seven billion, eight hundred seventy-four million, five hundred forty-seven thousand, nine hundred thirty-nine".