91954163 has 4 divisors (see below), whose sum is σ = 105090480. Its totient is φ = 78817848.

The previous prime is 91954151. The next prime is 91954169. The reversal of 91954163 is 36145919.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91954163 - 2⁸ = 91953907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91954169) 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, 6568148 + ... + 6568161.

It is an arithmetic number, because the mean of its divisors is an integer number (26272620).

Almost surely, 2^91954163 is an apocalyptic number.

91954163 is a deficient number, since it is larger than the sum of its proper divisors (13136317).

91954163 is a wasteful number, since it uses less digits than its factorization.

91954163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13136316.

The product of its digits is 29160, while the sum is 38.

The square root of 91954163 is about 9589.2733301330. The cubic root of 91954163 is about 451.3607584110.

The spelling of 91954163 in words is "ninety-one million, nine hundred fifty-four thousand, one hundred sixty-three".