97578213 has 24 divisors (see below), whose sum is σ = 139664448. Its totient is φ = 60483456.

The previous prime is 97578209. The next prime is 97578253. The reversal of 97578213 is 31287579.

It is not a de Polignac number, because 97578213 - 2² = 97578209 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97578253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93945 + ... + 94977.

It is an arithmetic number, because the mean of its divisors is an integer number (5819352).

Almost surely, 2^97578213 is an apocalyptic number.

It is an amenable number.

97578213 is a deficient number, since it is larger than the sum of its proper divisors (42086235).

97578213 is a wasteful number, since it uses less digits than its factorization.

97578213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133 (or 1096 counting only the distinct ones).

The product of its digits is 105840, while the sum is 42.

The square root of 97578213 is about 9878.1685043332. The cubic root of 97578213 is about 460.3812419155.

The spelling of 97578213 in words is "ninety-seven million, five hundred seventy-eight thousand, two hundred thirteen".