9911131 has 2 divisors, whose sum is σ = 9911132. Its totient is φ = 9911130.

The previous prime is 9911123. The next prime is 9911147. The reversal of 9911131 is 1311199.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9911131 - 2³ = 9911123 is a prime.

It is a super-2 number, since 2×9911131² = 196461035398322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9911096 and 9911105.

It is not a weakly prime, because it can be changed into another prime (9911101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4955565 + 4955566.

It is an arithmetic number, because the mean of its divisors is an integer number (4955566).

Almost surely, 2^9911131 is an apocalyptic number.

9911131 is a deficient number, since it is larger than the sum of its proper divisors (1).

9911131 is an equidigital number, since it uses as much as digits as its factorization.

9911131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 243, while the sum is 25.

The square root of 9911131 is about 3148.1948796096. The cubic root of 9911131 is about 214.8033608612.

The spelling of 9911131 in words is "nine million, nine hundred eleven thousand, one hundred thirty-one".