9813731 has 2 divisors, whose sum is σ = 9813732. Its totient is φ = 9813730.

The previous prime is 9813703. The next prime is 9813733. The reversal of 9813731 is 1373189.

9813731 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1373189) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9813731 is a prime.

It is a super-2 number, since 2×9813731² = 192618632280722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 9813733, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9813733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4906865 + 4906866.

It is an arithmetic number, because the mean of its divisors is an integer number (4906866).

Almost surely, 2^9813731 is an apocalyptic number.

9813731 is a deficient number, since it is larger than the sum of its proper divisors (1).

9813731 is an equidigital number, since it uses as much as digits as its factorization.

9813731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 32.

The square root of 9813731 is about 3132.6875043643. The cubic root of 9813731 is about 214.0973950359.

The spelling of 9813731 in words is "nine million, eight hundred thirteen thousand, seven hundred thirty-one".