97645231 has 4 divisors (see below), whose sum is σ = 100026864. Its totient is φ = 95263600.

The previous prime is 97645187. The next prime is 97645241. The reversal of 97645231 is 13254679.

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 97645231 - 2¹⁹ = 97120943 is a prime.

It is a super-2 number, since 2×97645231² = 19069182274086722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97645241) 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, 1190755 + ... + 1190836.

It is an arithmetic number, because the mean of its divisors is an integer number (25006716).

Almost surely, 2^97645231 is an apocalyptic number.

97645231 is a deficient number, since it is larger than the sum of its proper divisors (2381633).

97645231 is a wasteful number, since it uses less digits than its factorization.

97645231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2381632.

The product of its digits is 45360, while the sum is 37.

The square root of 97645231 is about 9881.5601500978. The cubic root of 97645231 is about 460.4866164255.

The spelling of 97645231 in words is "ninety-seven million, six hundred forty-five thousand, two hundred thirty-one".