91957105 has 16 divisors (see below), whose sum is σ = 117106560. Its totient is φ = 69169408.

The previous prime is 91957081. The next prime is 91957109. The reversal of 91957105 is 50175919.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 91957105 - 2²¹ = 89859953 is a prime.

It is a super-2 number, since 2×91957105² = 16912218319962050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91957109) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9 + ... + 13561.

It is an arithmetic number, because the mean of its divisors is an integer number (7319160).

Almost surely, 2^91957105 is an apocalyptic number.

It is an amenable number.

91957105 is a deficient number, since it is larger than the sum of its proper divisors (25149455).

91957105 is a wasteful number, since it uses less digits than its factorization.

91957105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13640.

The product of its (nonzero) digits is 14175, while the sum is 37.

The square root of 91957105 is about 9589.4267294766. The cubic root of 91957105 is about 451.3655720020.

The spelling of 91957105 in words is "ninety-one million, nine hundred fifty-seven thousand, one hundred five".