91227698179 has 4 divisors (see below), whose sum is σ = 96594033384. Its totient is φ = 85861362976.

The previous prime is 91227698173. The next prime is 91227698189. The reversal of 91227698179 is 97189672219.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97189672219 = 457 ⋅212668867.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91227698179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91227698173) 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, 2683167577 + ... + 2683167610.

It is an arithmetic number, because the mean of its divisors is an integer number (24148508346).

Almost surely, 2^91227698179 is an apocalyptic number.

91227698179 is a deficient number, since it is larger than the sum of its proper divisors (5366335205).

91227698179 is a wasteful number, since it uses less digits than its factorization.

91227698179 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5366335204.

The product of its digits is 6858432, while the sum is 61.

The spelling of 91227698179 in words is "ninety-one billion, two hundred twenty-seven million, six hundred ninety-eight thousand, one hundred seventy-nine".