91194923 has 4 divisors (see below), whose sum is σ = 92047320. Its totient is φ = 90342528.

The previous prime is 91194907. The next prime is 91194989. The reversal of 91194923 is 32949119.

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 91194923 - 2⁴ = 91194907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91194023) 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, 426038 + ... + 426251.

It is an arithmetic number, because the mean of its divisors is an integer number (23011830).

Almost surely, 2^91194923 is an apocalyptic number.

91194923 is a deficient number, since it is larger than the sum of its proper divisors (852397).

91194923 is a wasteful number, since it uses less digits than its factorization.

91194923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852396.

The product of its digits is 17496, while the sum is 38.

The square root of 91194923 is about 9549.6032901896. The cubic root of 91194923 is about 450.1150701612.

The spelling of 91194923 in words is "ninety-one million, one hundred ninety-four thousand, nine hundred twenty-three".