97100091 has 48 divisors (see below), whose sum is σ = 163537920. Its totient is φ = 54936000.

The previous prime is 97100083. The next prime is 97100093. The reversal of 97100091 is 19000179.

It is not a de Polignac number, because 97100091 - 2³ = 97100083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (97100093) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 88456 + ... + 89546.

It is an arithmetic number, because the mean of its divisors is an integer number (3407040).

Almost surely, 2^97100091 is an apocalyptic number.

97100091 is a deficient number, since it is larger than the sum of its proper divisors (66437829).

97100091 is a wasteful number, since it uses less digits than its factorization.

97100091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1168 (or 1165 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 27.

The square root of 97100091 is about 9853.9378423045. The cubic root of 97100091 is about 459.6280720786.

The spelling of 97100091 in words is "ninety-seven million, one hundred thousand, ninety-one".