97725631 has 4 divisors (see below), whose sum is σ = 97790112. Its totient is φ = 97661152.

The previous prime is 97725629. The next prime is 97725647. The reversal of 97725631 is 13652779.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97725631 - 2¹ = 97725629 is a prime.

It is a super-2 number, since 2×97725631² = 19100597908696322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97725031) 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 3 ways as a sum of consecutive naturals, for example, 29911 + ... + 33016.

It is an arithmetic number, because the mean of its divisors is an integer number (24447528).

Almost surely, 2^97725631 is an apocalyptic number.

97725631 is a deficient number, since it is larger than the sum of its proper divisors (64481).

97725631 is a wasteful number, since it uses less digits than its factorization.

97725631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64480.

The product of its digits is 79380, while the sum is 40.

The square root of 97725631 is about 9885.6274965224. The cubic root of 97725631 is about 460.6129682768.

The spelling of 97725631 in words is "ninety-seven million, seven hundred twenty-five thousand, six hundred thirty-one".