91879004491 has 8 divisors (see below), whose sum is σ = 97286298480. Its totient is φ = 86472004608.

The previous prime is 91879004471. The next prime is 91879004513. The reversal of 91879004491 is 19440097819.

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

It is a cyclic number.

It is not a de Polignac number, because 91879004491 - 2⁷ = 91879004363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91879004461) 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, 1204315 + ... + 1278331.

It is an arithmetic number, because the mean of its divisors is an integer number (12160787310).

Almost surely, 2^91879004491 is an apocalyptic number.

91879004491 is a deficient number, since it is larger than the sum of its proper divisors (5407293989).

91879004491 is a wasteful number, since it uses less digits than its factorization.

91879004491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147053.

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 91879004491 in words is "ninety-one billion, eight hundred seventy-nine million, four thousand, four hundred ninety-one".