97539813 has 12 divisors (see below), whose sum is σ = 161018208. Its totient is φ = 55737000.

The previous prime is 97539811. The next prime is 97539823. The reversal of 97539813 is 31893579.

It is a happy number.

It is not a de Polignac number, because 97539813 - 2¹ = 97539811 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 (97539811) 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, 774063 + ... + 774188.

It is an arithmetic number, because the mean of its divisors is an integer number (13418184).

Almost surely, 2^97539813 is an apocalyptic number.

It is an amenable number.

97539813 is a deficient number, since it is larger than the sum of its proper divisors (63478395).

97539813 is a wasteful number, since it uses less digits than its factorization.

97539813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548264 (or 1548261 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 97539813 is about 9876.2246329253. The cubic root of 97539813 is about 460.3208426430.

The spelling of 97539813 in words is "ninety-seven million, five hundred thirty-nine thousand, eight hundred thirteen".