9993631 has 4 divisors (see below), whose sum is σ = 10002664. Its totient is φ = 9984600.

The previous prime is 9993629. The next prime is 9993649. The reversal of 9993631 is 1363999.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 3-Lehmer number, since φ(9993631) divides (9993631-1)³.

It is a cyclic number.

It is not a de Polignac number, because 9993631 - 2¹ = 9993629 is a prime.

It is a super-2 number, since 2×9993631² = 199745321128322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9993611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2580 + ... + 5161.

It is an arithmetic number, because the mean of its divisors is an integer number (2500666).

Almost surely, 2^9993631 is an apocalyptic number.

9993631 is a deficient number, since it is larger than the sum of its proper divisors (9033).

9993631 is a wasteful number, since it uses less digits than its factorization.

9993631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9032.

The product of its digits is 39366, while the sum is 40.

The square root of 9993631 is about 3161.2704724525. The cubic root of 9993631 is about 215.3977206410.

The spelling of 9993631 in words is "nine million, nine hundred ninety-three thousand, six hundred thirty-one".