31108093 has 2 divisors, whose sum is σ = 31108094. Its totient is φ = 31108092.

The previous prime is 31108087. The next prime is 31108123. The reversal of 31108093 is 39080113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27857284 + 3250809 = 5278^2 + 1803^2 .

It is an emirp because it is prime and its reverse (39080113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31108093 - 2²¹ = 29010941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31108013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15554046 + 15554047.

It is an arithmetic number, because the mean of its divisors is an integer number (15554047).

Almost surely, 2^31108093 is an apocalyptic number.

It is an amenable number.

31108093 is a deficient number, since it is larger than the sum of its proper divisors (1).

31108093 is an equidigital number, since it uses as much as digits as its factorization.

31108093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 31108093 is about 5577.4629537093. The cubic root of 31108093 is about 314.5027613175.

The spelling of 31108093 in words is "thirty-one million, one hundred eight thousand, ninety-three".