97644013 has 4 divisors (see below), whose sum is σ = 99914848. Its totient is φ = 95373180.

The previous prime is 97644011. The next prime is 97644023. The reversal of 97644013 is 31044679.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 97644013 - 2¹ = 97644011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97644013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97644011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1135353 + ... + 1135438.

It is an arithmetic number, because the mean of its divisors is an integer number (24978712).

Almost surely, 2^97644013 is an apocalyptic number.

It is an amenable number.

97644013 is a deficient number, since it is larger than the sum of its proper divisors (2270835).

97644013 is a wasteful number, since it uses less digits than its factorization.

97644013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2270834.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 97644013 is about 9881.4985199614. The cubic root of 97644013 is about 460.4847017560.

The spelling of 97644013 in words is "ninety-seven million, six hundred forty-four thousand, thirteen".