9161631 has 6 divisors (see below), whose sum is σ = 13233480. Its totient is φ = 6107748.

The previous prime is 9161611. The next prime is 9161639. The reversal of 9161631 is 1361619.

It is not a de Polignac number, because 9161631 - 2¹³ = 9153439 is a prime.

It is a super-2 number, since 2×9161631² = 167870965160322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9161595 and 9161604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9161639) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 508971 + ... + 508988.

It is an arithmetic number, because the mean of its divisors is an integer number (2205580).

Almost surely, 2^9161631 is an apocalyptic number.

9161631 is a deficient number, since it is larger than the sum of its proper divisors (4071849).

9161631 is a wasteful number, since it uses less digits than its factorization.

9161631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017965 (or 1017962 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 9161631 is about 3026.8186268754. The cubic root of 9161631 is about 209.2462090842.

The spelling of 9161631 in words is "nine million, one hundred sixty-one thousand, six hundred thirty-one".