91394364959 has 4 divisors (see below), whose sum is σ = 91395066504. Its totient is φ = 91393663416.

The previous prime is 91394364949. The next prime is 91394365043. The reversal of 91394364959 is 95946349319.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 95946349319 = 111863 ⋅857713.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91394364959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91394364949) 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, 91457 + ... + 437210.

It is an arithmetic number, because the mean of its divisors is an integer number (22848766626).

Almost surely, 2^91394364959 is an apocalyptic number.

91394364959 is a deficient number, since it is larger than the sum of its proper divisors (701545).

91394364959 is a wasteful number, since it uses less digits than its factorization.

91394364959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701544.

The product of its digits is 28343520, while the sum is 62.

The spelling of 91394364959 in words is "ninety-one billion, three hundred ninety-four million, three hundred sixty-four thousand, nine hundred fifty-nine".