9091631 has 2 divisors, whose sum is σ = 9091632. Its totient is φ = 9091630.

The previous prime is 9091613. The next prime is 9091637. The reversal of 9091631 is 1361909.

Together with previous prime (9091613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9091631 - 2¹⁸ = 8829487 is a prime.

It is a super-2 number, since 2×9091631² = 165315508480322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9091594 and 9091603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9091637) 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, 4545815 + 4545816.

It is an arithmetic number, because the mean of its divisors is an integer number (4545816).

Almost surely, 2^9091631 is an apocalyptic number.

9091631 is a deficient number, since it is larger than the sum of its proper divisors (1).

9091631 is an equidigital number, since it uses as much as digits as its factorization.

9091631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 9091631 is about 3015.2331584805. The cubic root of 9091631 is about 208.7119265546.

The spelling of 9091631 in words is "nine million, ninety-one thousand, six hundred thirty-one".