91715373241 has 2 divisors, whose sum is σ = 91715373242. Its totient is φ = 91715373240.

The previous prime is 91715373221. The next prime is 91715373257. The reversal of 91715373241 is 14237351719.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81279729216 + 10435644025 = 285096^2 + 102155^2 .

It is a cyclic number.

It is not a de Polignac number, because 91715373241 - 2¹⁵ = 91715340473 is a prime.

It is not a weakly prime, because it can be changed into another prime (91715373221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45857686620 + 45857686621.

It is an arithmetic number, because the mean of its divisors is an integer number (45857686621).

Almost surely, 2^91715373241 is an apocalyptic number.

It is an amenable number.

91715373241 is a deficient number, since it is larger than the sum of its proper divisors (1).

91715373241 is an equidigital number, since it uses as much as digits as its factorization.

91715373241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 43.

The spelling of 91715373241 in words is "ninety-one billion, seven hundred fifteen million, three hundred seventy-three thousand, two hundred forty-one".