97656813 has 16 divisors (see below), whose sum is σ = 145723200. Its totient is φ = 64633680.

The previous prime is 97656809. The next prime is 97656841. The reversal of 97656813 is 31865679.

It is a happy number.

97656813 is a `hidden beast` number, since 9 + 76 + 568 + 13 = 666.

It is not a de Polignac number, because 97656813 - 2² = 97656809 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97656863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9258 + ... + 16763.

It is an arithmetic number, because the mean of its divisors is an integer number (9107700).

Almost surely, 2^97656813 is an apocalyptic number.

It is an amenable number.

97656813 is a deficient number, since it is larger than the sum of its proper divisors (48066387).

97656813 is a wasteful number, since it uses less digits than its factorization.

97656813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26169 (or 26163 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 97656813 is about 9882.1461737823. The cubic root of 97656813 is about 460.5048222818.

The spelling of 97656813 in words is "ninety-seven million, six hundred fifty-six thousand, eight hundred thirteen".