97570091 has 2 divisors, whose sum is σ = 97570092. Its totient is φ = 97570090.

The previous prime is 97570079. The next prime is 97570127. The reversal of 97570091 is 19007579.

It is a weak prime.

It is an emirp because it is prime and its reverse (19007579) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97570091 - 2²⁶ = 30461227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97570061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48785045 + 48785046.

It is an arithmetic number, because the mean of its divisors is an integer number (48785046).

Almost surely, 2^97570091 is an apocalyptic number.

97570091 is a deficient number, since it is larger than the sum of its proper divisors (1).

97570091 is an equidigital number, since it uses as much as digits as its factorization.

97570091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19845, while the sum is 38.

The square root of 97570091 is about 9877.7573871806. The cubic root of 97570091 is about 460.3684681617.

The spelling of 97570091 in words is "ninety-seven million, five hundred seventy thousand, ninety-one".