9959631 has 12 divisors (see below), whose sum is σ = 14597016. Its totient is φ = 6035920.

The previous prime is 9959611. The next prime is 9959633. The reversal of 9959631 is 1369599.

It is not a de Polignac number, because 9959631 - 2¹⁴ = 9943247 is a prime.

It is a super-2 number, since 2×9959631² = 198388499312322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9959633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13356 + ... + 14081.

It is an arithmetic number, because the mean of its divisors is an integer number (1216418).

Almost surely, 2^9959631 is an apocalyptic number.

9959631 is a deficient number, since it is larger than the sum of its proper divisors (4637385).

9959631 is a wasteful number, since it uses less digits than its factorization.

9959631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27462 (or 27451 counting only the distinct ones).

The product of its digits is 65610, while the sum is 42.

The square root of 9959631 is about 3155.8883060083. Note that the first 3 decimals coincide. The cubic root of 9959631 is about 215.1531701028.

The spelling of 9959631 in words is "nine million, nine hundred fifty-nine thousand, six hundred thirty-one".