91507419697 has 4 divisors (see below), whose sum is σ = 91805489776. Its totient is φ = 91209349620.

The previous prime is 91507419683. The next prime is 91507419701. The reversal of 91507419697 is 79691470519.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91507419697 - 2¹⁹ = 91506895409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91507419607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149034579 + ... + 149035192.

It is an arithmetic number, because the mean of its divisors is an integer number (22951372444).

Almost surely, 2^91507419697 is an apocalyptic number.

It is an amenable number.

91507419697 is a deficient number, since it is larger than the sum of its proper divisors (298070079).

91507419697 is a wasteful number, since it uses less digits than its factorization.

91507419697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298070078.

The product of its (nonzero) digits is 4286520, while the sum is 58.

The spelling of 91507419697 in words is "ninety-one billion, five hundred seven million, four hundred nineteen thousand, six hundred ninety-seven".