31119113 has 2 divisors, whose sum is σ = 31119114. Its totient is φ = 31119112.

The previous prime is 31119091. The next prime is 31119119. The reversal of 31119113 is 31191113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20043529 + 11075584 = 4477^2 + 3328^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31119113 is a prime.

It is not a weakly prime, because it can be changed into another prime (31119119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15559556 + 15559557.

It is an arithmetic number, because the mean of its divisors is an integer number (15559557).

Almost surely, 2^31119113 is an apocalyptic number.

It is an amenable number.

31119113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31119113 is an equidigital number, since it uses as much as digits as its factorization.

31119113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81, while the sum is 20.

The square root of 31119113 is about 5578.4507705993. The cubic root of 31119113 is about 314.5398943261.

The spelling of 31119113 in words is "thirty-one million, one hundred nineteen thousand, one hundred thirteen".