9920631 has 8 divisors (see below), whose sum is σ = 15117184. Its totient is φ = 5668920.

The previous prime is 9920621. The next prime is 9920653. The reversal of 9920631 is 1360299.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9920631 - 2¹⁰ = 9919607 is a prime.

It is a super-3 number, since 3×9920631³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9920611) 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 in 7 ways as a sum of consecutive naturals, for example, 236185 + ... + 236226.

It is an arithmetic number, because the mean of its divisors is an integer number (1889648).

Almost surely, 2^9920631 is an apocalyptic number.

9920631 is a deficient number, since it is larger than the sum of its proper divisors (5196553).

9920631 is a wasteful number, since it uses less digits than its factorization.

9920631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472421.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 9920631 is about 3149.7033193620. The cubic root of 9920631 is about 214.8719699257.

The spelling of 9920631 in words is "nine million, nine hundred twenty thousand, six hundred thirty-one".