97907990 has 16 divisors (see below), whose sum is σ = 180333648. Its totient is φ = 38252256.

The previous prime is 97907933. The next prime is 97907993. The reversal of 97907990 is 9970979.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97907993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113417 + ... + 114276.

It is an arithmetic number, because the mean of its divisors is an integer number (11270853).

Almost surely, 2^97907990 is an apocalyptic number.

97907990 is a deficient number, since it is larger than the sum of its proper divisors (82425658).

97907990 is a wasteful number, since it uses less digits than its factorization.

97907990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227743.

The product of its (nonzero) digits is 321489, while the sum is 50.

The square root of 97907990 is about 9894.8466385286. The cubic root of 97907990 is about 460.8992961882.

The spelling of 97907990 in words is "ninety-seven million, nine hundred seven thousand, nine hundred ninety".