9989431 has 2 divisors, whose sum is σ = 9989432. Its totient is φ = 9989430.

The previous prime is 9989423. The next prime is 9989437. The reversal of 9989431 is 1349899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9989431 - 2³ = 9989423 is a prime.

It is a super-2 number, since 2×9989431² = 199577463407522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9989437) 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, 4994715 + 4994716.

It is an arithmetic number, because the mean of its divisors is an integer number (4994716).

Almost surely, 2^9989431 is an apocalyptic number.

9989431 is a deficient number, since it is larger than the sum of its proper divisors (1).

9989431 is an equidigital number, since it uses as much as digits as its factorization.

9989431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 43.

The square root of 9989431 is about 3160.6061127575. The cubic root of 9989431 is about 215.3675415135.

The spelling of 9989431 in words is "nine million, nine hundred eighty-nine thousand, four hundred thirty-one".