9959731 has 8 divisors (see below), whose sum is σ = 10479600. Its totient is φ = 9451680.

The previous prime is 9959699. The next prime is 9959749. The reversal of 9959731 is 1379599.

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

It is not a de Polignac number, because 9959731 - 2⁵ = 9959699 is a prime.

It is a super-2 number, since 2×9959731² = 198392483184722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9959231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1200 + ... + 4621.

It is an arithmetic number, because the mean of its divisors is an integer number (1309950).

Almost surely, 2^9959731 is an apocalyptic number.

9959731 is a deficient number, since it is larger than the sum of its proper divisors (519869).

9959731 is a wasteful number, since it uses less digits than its factorization.

9959731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5909.

The product of its digits is 76545, while the sum is 43.

The square root of 9959731 is about 3155.9041493683. The cubic root of 9959731 is about 215.1538901846.

The spelling of 9959731 in words is "nine million, nine hundred fifty-nine thousand, seven hundred thirty-one".