9903431 has 2 divisors, whose sum is σ = 9903432. Its totient is φ = 9903430.

The previous prime is 9903407. The next prime is 9903451. The reversal of 9903431 is 1343099.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9903431 is a prime.

It is a super-2 number, since 2×9903431² = 196155891143522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 9903394 and 9903403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9903451) 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, 4951715 + 4951716.

It is an arithmetic number, because the mean of its divisors is an integer number (4951716).

Almost surely, 2^9903431 is an apocalyptic number.

9903431 is a deficient number, since it is larger than the sum of its proper divisors (1).

9903431 is an equidigital number, since it uses as much as digits as its factorization.

9903431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 9903431 is about 3146.9717189705. The cubic root of 9903431 is about 214.7477192331.

The spelling of 9903431 in words is "nine million, nine hundred three thousand, four hundred thirty-one".