11831931 has 6 divisors (see below), whose sum is σ = 17090580. Its totient is φ = 7887948.

The previous prime is 11831917. The next prime is 11831951. The reversal of 11831931 is 13913811.

It is a happy number.

It is not a de Polignac number, because 11831931 - 2⁷ = 11831803 is a prime.

It is a super-2 number, since 2×11831931² = 279989182377522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11831895 and 11831904.

It is not an unprimeable number, because it can be changed into a prime (11831951) 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 5 ways as a sum of consecutive naturals, for example, 657321 + ... + 657338.

It is an arithmetic number, because the mean of its divisors is an integer number (2848430).

Almost surely, 2^11831931 is an apocalyptic number.

11831931 is a deficient number, since it is larger than the sum of its proper divisors (5258649).

11831931 is a wasteful number, since it uses less digits than its factorization.

11831931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314665 (or 1314662 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 11831931 is about 3439.7574042365. The cubic root of 11831931 is about 227.8689805879.

The spelling of 11831931 in words is "eleven million, eight hundred thirty-one thousand, nine hundred thirty-one".