91444931 has 2 divisors, whose sum is σ = 91444932. Its totient is φ = 91444930.

The previous prime is 91444909. The next prime is 91444937. The reversal of 91444931 is 13944419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91444931 - 2¹⁰ = 91443907 is a prime.

It is a super-2 number, since 2×91444931² = 16724350811189522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 91444891 and 91444900.

It is not a weakly prime, because it can be changed into another prime (91444937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45722465 + 45722466.

It is an arithmetic number, because the mean of its divisors is an integer number (45722466).

Almost surely, 2^91444931 is an apocalyptic number.

91444931 is a deficient number, since it is larger than the sum of its proper divisors (1).

91444931 is an equidigital number, since it uses as much as digits as its factorization.

91444931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 91444931 is about 9562.6842988776. The cubic root of 91444931 is about 450.5260202684.

The spelling of 91444931 in words is "ninety-one million, four hundred forty-four thousand, nine hundred thirty-one".