91493550719 has 2 divisors, whose sum is σ = 91493550720. Its totient is φ = 91493550718.

The previous prime is 91493550713. The next prime is 91493550721. The reversal of 91493550719 is 91705539419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91493550719 - 2²⁴ = 91476773503 is a prime.

It is a super-2 number, since 2×91493550719² (a number of 23 digits) contains 22 as substring.

Together with 91493550721, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91493550713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45746775359 + 45746775360.

It is an arithmetic number, because the mean of its divisors is an integer number (45746775360).

Almost surely, 2^91493550719 is an apocalyptic number.

91493550719 is a deficient number, since it is larger than the sum of its proper divisors (1).

91493550719 is an equidigital number, since it uses as much as digits as its factorization.

91493550719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1530900, while the sum is 53.

The spelling of 91493550719 in words is "ninety-one billion, four hundred ninety-three million, five hundred fifty thousand, seven hundred nineteen".