97820431 has 12 divisors (see below), whose sum is σ = 104380000. Its totient is φ = 91653120.

The previous prime is 97820423. The next prime is 97820453. The reversal of 97820431 is 13402879.

It is not a de Polignac number, because 97820431 - 2³ = 97820423 is a prime.

It is a super-2 number, since 2×97820431² = 19137673442051522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97820461) 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, 77695 + ... + 78943.

Almost surely, 2^97820431 is an apocalyptic number.

97820431 is a deficient number, since it is larger than the sum of its proper divisors (6559569).

97820431 is a wasteful number, since it uses less digits than its factorization.

97820431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554 (or 1537 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 97820431 is about 9890.4211740451. The cubic root of 97820431 is about 460.7618613118.

The spelling of 97820431 in words is "ninety-seven million, eight hundred twenty thousand, four hundred thirty-one".