9975431 has 2 divisors, whose sum is σ = 9975432. Its totient is φ = 9975430.

The previous prime is 9975403. The next prime is 9975451. The reversal of 9975431 is 1345799.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9975431 - 2⁶ = 9975367 is a prime.

It is a super-2 number, since 2×9975431² = 199018447271522, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9975451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4987715 + 4987716.

It is an arithmetic number, because the mean of its divisors is an integer number (4987716).

Almost surely, 2^9975431 is an apocalyptic number.

9975431 is a deficient number, since it is larger than the sum of its proper divisors (1).

9975431 is an equidigital number, since it uses as much as digits as its factorization.

9975431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 38.

The square root of 9975431 is about 3158.3905711612. The cubic root of 9975431 is about 215.2668832867.

The spelling of 9975431 in words is "nine million, nine hundred seventy-five thousand, four hundred thirty-one".