9899631 has 16 divisors (see below), whose sum is σ = 16761600. Its totient is φ = 5656824.

The previous prime is 9899621. The next prime is 9899641. The reversal of 9899631 is 1369989.

9899631 is a `hidden beast` number, since 9 + 8 + 9 + 9 + 631 = 666.

It is an interprime number because it is at equal distance from previous prime (9899621) and next prime (9899641).

It is not a de Polignac number, because 9899631 - 2⁵ = 9899599 is a prime.

It is a super-2 number, since 2×9899631² = 196005387872322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9899611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26001 + ... + 26378.

It is an arithmetic number, because the mean of its divisors is an integer number (1047600).

Almost surely, 2^9899631 is an apocalyptic number.

9899631 is a deficient number, since it is larger than the sum of its proper divisors (6861969).

9899631 is a wasteful number, since it uses less digits than its factorization.

9899631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52395 (or 52389 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 9899631 is about 3146.3679060148. The cubic root of 9899631 is about 214.7202490992.

The spelling of 9899631 in words is "nine million, eight hundred ninety-nine thousand, six hundred thirty-one".