91976789413 has 8 divisors (see below), whose sum is σ = 93720470688. Its totient is φ = 90233414544.

The previous prime is 91976789363. The next prime is 91976789431. The reversal of 91976789413 is 31498767919.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91976789413 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 (91976789473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582706 + ... + 723532.

It is an arithmetic number, because the mean of its divisors is an integer number (11715058836).

Almost surely, 2^91976789413 is an apocalyptic number.

It is an amenable number.

91976789413 is a deficient number, since it is larger than the sum of its proper divisors (1743681275).

91976789413 is a wasteful number, since it uses less digits than its factorization.

91976789413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153203.

The product of its digits is 20575296, while the sum is 64.

The spelling of 91976789413 in words is "ninety-one billion, nine hundred seventy-six million, seven hundred eighty-nine thousand, four hundred thirteen".