97159091 has 2 divisors, whose sum is σ = 97159092. Its totient is φ = 97159090.

The previous prime is 97159087. The next prime is 97159099. The reversal of 97159091 is 19095179.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (19095179) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 97159091 - 2² = 97159087 is a prime.

It is not a weakly prime, because it can be changed into another prime (97159099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48579545 + 48579546.

It is an arithmetic number, because the mean of its divisors is an integer number (48579546).

Almost surely, 2^97159091 is an apocalyptic number.

97159091 is a deficient number, since it is larger than the sum of its proper divisors (1).

97159091 is an equidigital number, since it uses as much as digits as its factorization.

97159091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25515, while the sum is 41.

The square root of 97159091 is about 9856.9311147030. The cubic root of 97159091 is about 459.7211463670.

The spelling of 97159091 in words is "ninety-seven million, one hundred fifty-nine thousand, ninety-one".