97297491 has 4 divisors (see below), whose sum is σ = 129729992. Its totient is φ = 64864992.

The previous prime is 97297481. The next prime is 97297493. The reversal of 97297491 is 19479279.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 97297491 - 2⁷ = 97297363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97297491.

It is not an unprimeable number, because it can be changed into a prime (97297493) 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 3 ways as a sum of consecutive naturals, for example, 16216246 + ... + 16216251.

It is an arithmetic number, because the mean of its divisors is an integer number (32432498).

Almost surely, 2^97297491 is an apocalyptic number.

97297491 is a deficient number, since it is larger than the sum of its proper divisors (32432501).

97297491 is a wasteful number, since it uses less digits than its factorization.

97297491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32432500.

The product of its digits is 285768, while the sum is 48.

The square root of 97297491 is about 9863.9490570461. The cubic root of 97297491 is about 459.9393287972.

The spelling of 97297491 in words is "ninety-seven million, two hundred ninety-seven thousand, four hundred ninety-one".