97390815 has 16 divisors (see below), whose sum is σ = 159141888. Its totient is φ = 50836256.

The previous prime is 97390801. The next prime is 97390817. The reversal of 97390815 is 51809379.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 97390815 - 2¹⁰ = 97389791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97390817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68367 + ... + 69776.

It is an arithmetic number, because the mean of its divisors is an integer number (9946368).

Almost surely, 2^97390815 is an apocalyptic number.

97390815 is a deficient number, since it is larger than the sum of its proper divisors (61751073).

97390815 is a wasteful number, since it uses less digits than its factorization.

97390815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138198.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 97390815 is about 9868.6784829581. The cubic root of 97390815 is about 460.0863338272.

The spelling of 97390815 in words is "ninety-seven million, three hundred ninety thousand, eight hundred fifteen".