97131091 has 8 divisors (see below), whose sum is σ = 102711168. Its totient is φ = 91704000.

The previous prime is 97131077. The next prime is 97131101. The reversal of 97131091 is 19013179.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 97131091 - 2⁷ = 97130963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97131191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36940 + ... + 39481.

It is an arithmetic number, because the mean of its divisors is an integer number (12838896).

Almost surely, 2^97131091 is an apocalyptic number.

97131091 is a deficient number, since it is larger than the sum of its proper divisors (5580077).

97131091 is a wasteful number, since it uses less digits than its factorization.

97131091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76493.

The product of its (nonzero) digits is 1701, while the sum is 31.

The square root of 97131091 is about 9855.5106919936. The cubic root of 97131091 is about 459.6769802175.

The spelling of 97131091 in words is "ninety-seven million, one hundred thirty-one thousand, ninety-one".