31118953 has 2 divisors, whose sum is σ = 31118954. Its totient is φ = 31118952.

The previous prime is 31118933. The next prime is 31118999. The reversal of 31118953 is 35981113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29192409 + 1926544 = 5403^2 + 1388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31118953 is a prime.

It is not a weakly prime, because it can be changed into another prime (31118933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15559476 + 15559477.

It is an arithmetic number, because the mean of its divisors is an integer number (15559477).

Almost surely, 2^31118953 is an apocalyptic number.

It is an amenable number.

31118953 is a deficient number, since it is larger than the sum of its proper divisors (1).

31118953 is an equidigital number, since it uses as much as digits as its factorization.

31118953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 31.

The square root of 31118953 is about 5578.4364296817. The cubic root of 31118953 is about 314.5393552526.

The spelling of 31118953 in words is "thirty-one million, one hundred eighteen thousand, nine hundred fifty-three".