91442951 has 2 divisors, whose sum is σ = 91442952. Its totient is φ = 91442950.

The previous prime is 91442941. The next prime is 91442971. The reversal of 91442951 is 15924419.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91442951 - 2¹⁸ = 91180807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91442941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45721475 + 45721476.

It is an arithmetic number, because the mean of its divisors is an integer number (45721476).

Almost surely, 2^91442951 is an apocalyptic number.

91442951 is a deficient number, since it is larger than the sum of its proper divisors (1).

91442951 is an equidigital number, since it uses as much as digits as its factorization.

91442951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 35.

The square root of 91442951 is about 9562.5807709007. The cubic root of 91442951 is about 450.5227685921.

The spelling of 91442951 in words is "ninety-one million, four hundred forty-two thousand, nine hundred fifty-one".