97990797 has 12 divisors (see below), whose sum is σ = 135318560. Its totient is φ = 63072912.

The previous prime is 97990727. The next prime is 97990807. The reversal of 97990797 is 79709979.

It is not a de Polignac number, because 97990797 - 2¹² = 97986701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97990727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16897 + ... + 21942.

Almost surely, 2^97990797 is an apocalyptic number.

It is an amenable number.

97990797 is a deficient number, since it is larger than the sum of its proper divisors (37327763).

97990797 is a wasteful number, since it uses less digits than its factorization.

97990797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38900 (or 38871 counting only the distinct ones).

The product of its (nonzero) digits is 2250423, while the sum is 57.

The square root of 97990797 is about 9899.0301040051. The cubic root of 97990797 is about 461.0291968339.

The spelling of 97990797 in words is "ninety-seven million, nine hundred ninety thousand, seven hundred ninety-seven".