9959431 has 2 divisors, whose sum is σ = 9959432. Its totient is φ = 9959430.

The previous prime is 9959407. The next prime is 9959447. The reversal of 9959431 is 1349599.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9959431 - 2⁷ = 9959303 is a prime.

It is a super-2 number, since 2×9959431² = 198380531687522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9959461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4979715 + 4979716.

It is an arithmetic number, because the mean of its divisors is an integer number (4979716).

Almost surely, 2^9959431 is an apocalyptic number.

9959431 is a deficient number, since it is larger than the sum of its proper divisors (1).

9959431 is an equidigital number, since it uses as much as digits as its factorization.

9959431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 40.

The square root of 9959431 is about 3155.8566190497. The cubic root of 9959431 is about 215.1517299249.

The spelling of 9959431 in words is "nine million, nine hundred fifty-nine thousand, four hundred thirty-one".