91995223 has 2 divisors, whose sum is σ = 91995224. Its totient is φ = 91995222.

The previous prime is 91995217. The next prime is 91995229. The reversal of 91995223 is 32259919.

It is a balanced prime because it is at equal distance from previous prime (91995217) and next prime (91995229).

It is a cyclic number.

It is not a de Polignac number, because 91995223 - 2⁵ = 91995191 is a prime.

It is equal to p_5325979 and since 91995223 and 5325979 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91995229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45997611 + 45997612.

It is an arithmetic number, because the mean of its divisors is an integer number (45997612).

Almost surely, 2^91995223 is an apocalyptic number.

91995223 is a deficient number, since it is larger than the sum of its proper divisors (1).

91995223 is an equidigital number, since it uses as much as digits as its factorization.

91995223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 40.

The square root of 91995223 is about 9591.4140250539. The cubic root of 91995223 is about 451.4279299754.

The spelling of 91995223 in words is "ninety-one million, nine hundred ninety-five thousand, two hundred twenty-three".