9957331 has 2 divisors, whose sum is σ = 9957332. Its totient is φ = 9957330.

The previous prime is 9957323. The next prime is 9957347. The reversal of 9957331 is 1337599.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9957331 - 2³ = 9957323 is a prime.

It is a super-2 number, since 2×9957331² = 198296881287122, which contains 22 as substring.

It is equal to p₆₆₁₉₇₈ and since 9957331 and 661978 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (9957391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4978665 + 4978666.

It is an arithmetic number, because the mean of its divisors is an integer number (4978666).

Almost surely, 2^9957331 is an apocalyptic number.

9957331 is a deficient number, since it is larger than the sum of its proper divisors (1).

9957331 is an equidigital number, since it uses as much as digits as its factorization.

9957331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25515, while the sum is 37.

The square root of 9957331 is about 3155.5238867738. The cubic root of 9957331 is about 215.1366068925.

The spelling of 9957331 in words is "nine million, nine hundred fifty-seven thousand, three hundred thirty-one".