97297091 has 2 divisors, whose sum is σ = 97297092. Its totient is φ = 97297090.

The previous prime is 97297073. The next prime is 97297129. The reversal of 97297091 is 19079279.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97297091 - 2⁶ = 97297027 is a prime.

It is not a weakly prime, because it can be changed into another prime (97297021) 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 as a sum of consecutive naturals, namely, 48648545 + 48648546.

It is an arithmetic number, because the mean of its divisors is an integer number (48648546).

Almost surely, 2^97297091 is an apocalyptic number.

97297091 is a deficient number, since it is larger than the sum of its proper divisors (1).

97297091 is an equidigital number, since it uses as much as digits as its factorization.

97297091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71442, while the sum is 44.

The square root of 97297091 is about 9863.9287811703. The cubic root of 97297091 is about 459.9386985103.

The spelling of 97297091 in words is "ninety-seven million, two hundred ninety-seven thousand, ninety-one".