31108193 has 2 divisors, whose sum is σ = 31108194. Its totient is φ = 31108192.

The previous prime is 31108183. The next prime is 31108199. The reversal of 31108193 is 39180113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31047184 + 61009 = 5572^2 + 247^2 .

It is a cyclic number.

It is not a de Polignac number, because 31108193 - 2²² = 26913889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31108199) 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 as a sum of consecutive naturals, namely, 15554096 + 15554097.

It is an arithmetic number, because the mean of its divisors is an integer number (15554097).

Almost surely, 2^31108193 is an apocalyptic number.

It is an amenable number.

31108193 is a deficient number, since it is larger than the sum of its proper divisors (1).

31108193 is an equidigital number, since it uses as much as digits as its factorization.

31108193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 31108193 is about 5577.4719183515. The cubic root of 31108193 is about 314.5030983171.

The spelling of 31108193 in words is "thirty-one million, one hundred eight thousand, one hundred ninety-three".