91838097 has 32 divisors (see below), whose sum is σ = 155151360. Its totient is φ = 53187840.

The previous prime is 91838069. The next prime is 91838101. The reversal of 91838097 is 79083819.

It is not a de Polignac number, because 91838097 - 2⁷ = 91837969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91838297) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1729 + ... + 13662.

It is an arithmetic number, because the mean of its divisors is an integer number (4848480).

Almost surely, 2^91838097 is an apocalyptic number.

It is an amenable number.

91838097 is a deficient number, since it is larger than the sum of its proper divisors (63313263).

91838097 is a wasteful number, since it uses less digits than its factorization.

91838097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15430 (or 15424 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 91838097 is about 9583.2195529477. The cubic root of 91838097 is about 451.1707735568.

The spelling of 91838097 in words is "ninety-one million, eight hundred thirty-eight thousand, ninety-seven".