9913831 has 8 divisors (see below), whose sum is σ = 10292864. Its totient is φ = 9538560.

The previous prime is 9913811. The next prime is 9913837. The reversal of 9913831 is 1383199.

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

It is a cyclic number.

It is not a de Polignac number, because 9913831 - 2¹³ = 9905639 is a prime.

It is a super-2 number, since 2×9913831² = 196568090193122, 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 (9913837) 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, 5155 + ... + 6811.

It is an arithmetic number, because the mean of its divisors is an integer number (1286608).

Almost surely, 2^9913831 is an apocalyptic number.

9913831 is a deficient number, since it is larger than the sum of its proper divisors (379033).

9913831 is a wasteful number, since it uses less digits than its factorization.

9913831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881.

The product of its digits is 5832, while the sum is 34.

The square root of 9913831 is about 3148.6236675729. The cubic root of 9913831 is about 214.8228647374.

The spelling of 9913831 in words is "nine million, nine hundred thirteen thousand, eight hundred thirty-one".