9975631 has 2 divisors, whose sum is σ = 9975632. Its totient is φ = 9975630.

The previous prime is 9975619. The next prime is 9975643. The reversal of 9975631 is 1365799.

It is a balanced prime because it is at equal distance from previous prime (9975619) and next prime (9975643).

It is an emirp because it is prime and its reverse (1365799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9975631 - 2⁵ = 9975599 is a prime.

It is a super-2 number, since 2×9975631² = 199026427696322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9975131) 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, 4987815 + 4987816.

It is an arithmetic number, because the mean of its divisors is an integer number (4987816).

Almost surely, 2^9975631 is an apocalyptic number.

9975631 is a deficient number, since it is larger than the sum of its proper divisors (1).

9975631 is an equidigital number, since it uses as much as digits as its factorization.

9975631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 40.

The square root of 9975631 is about 3158.4222326978. The cubic root of 9975631 is about 215.2683219242.

The spelling of 9975631 in words is "nine million, nine hundred seventy-five thousand, six hundred thirty-one".