91994495 has 4 divisors (see below), whose sum is σ = 110393400. Its totient is φ = 73595592.

The previous prime is 91994491. The next prime is 91994519. The reversal of 91994495 is 59449919.

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 91994495 - 2² = 91994491 is a prime.

It is a super-2 number, since 2×91994495² = 16925974220610050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91994491) 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, 9199445 + ... + 9199454.

It is an arithmetic number, because the mean of its divisors is an integer number (27598350).

Almost surely, 2^91994495 is an apocalyptic number.

91994495 is a deficient number, since it is larger than the sum of its proper divisors (18398905).

91994495 is a wasteful number, since it uses less digits than its factorization.

91994495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18398904.

The product of its digits is 524880, while the sum is 50.

The square root of 91994495 is about 9591.3760743701. The cubic root of 91994495 is about 451.4267391875.

The spelling of 91994495 in words is "ninety-one million, nine hundred ninety-four thousand, four hundred ninety-five".