91400957 has 2 divisors, whose sum is σ = 91400958. Its totient is φ = 91400956.

The previous prime is 91400951. The next prime is 91400977. The reversal of 91400957 is 75900419.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48288601 + 43112356 = 6949^2 + 6566^2 .

It is a cyclic number.

It is not a de Polignac number, because 91400957 - 2⁶ = 91400893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91400951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45700478 + 45700479.

It is an arithmetic number, because the mean of its divisors is an integer number (45700479).

Almost surely, 2^91400957 is an apocalyptic number.

It is an amenable number.

91400957 is a deficient number, since it is larger than the sum of its proper divisors (1).

91400957 is an equidigital number, since it uses as much as digits as its factorization.

91400957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 91400957 is about 9560.3847725915. The cubic root of 91400957 is about 450.4537924351.

The spelling of 91400957 in words is "ninety-one million, four hundred thousand, nine hundred fifty-seven".