91707408839 has 2 divisors, whose sum is σ = 91707408840. Its totient is φ = 91707408838.

The previous prime is 91707408797. The next prime is 91707408869. The reversal of 91707408839 is 93880470719.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91707408839 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91707408869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45853704419 + 45853704420.

It is an arithmetic number, because the mean of its divisors is an integer number (45853704420).

Almost surely, 2^91707408839 is an apocalyptic number.

91707408839 is a deficient number, since it is larger than the sum of its proper divisors (1).

91707408839 is an equidigital number, since it uses as much as digits as its factorization.

91707408839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 56.

The spelling of 91707408839 in words is "ninety-one billion, seven hundred seven million, four hundred eight thousand, eight hundred thirty-nine".