31118933 has 2 divisors, whose sum is σ = 31118934. Its totient is φ = 31118932.

The previous prime is 31118911. The next prime is 31118953. The reversal of 31118933 is 33981113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25633969 + 5484964 = 5063^2 + 2342^2 .

It is a cyclic number.

It is not a de Polignac number, because 31118933 - 2⁶ = 31118869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31118896 and 31118905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31118953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15559466 + 15559467.

It is an arithmetic number, because the mean of its divisors is an integer number (15559467).

Almost surely, 2^31118933 is an apocalyptic number.

It is an amenable number.

31118933 is a deficient number, since it is larger than the sum of its proper divisors (1).

31118933 is an equidigital number, since it uses as much as digits as its factorization.

31118933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 29.

The square root of 31118933 is about 5578.4346370644. The cubic root of 31118933 is about 314.5392878683.

The spelling of 31118933 in words is "thirty-one million, one hundred eighteen thousand, nine hundred thirty-three".