231113893 has 2 divisors, whose sum is σ = 231113894. Its totient is φ = 231113892.

The previous prime is 231113851. The next prime is 231113903. The reversal of 231113893 is 398311132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230979204 + 134689 = 15198^2 + 367^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231113893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231113293) 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, 115556946 + 115556947.

It is an arithmetic number, because the mean of its divisors is an integer number (115556947).

Almost surely, 2^231113893 is an apocalyptic number.

It is an amenable number.

231113893 is a deficient number, since it is larger than the sum of its proper divisors (1).

231113893 is an equidigital number, since it uses as much as digits as its factorization.

231113893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 231113893 is about 15202.4304964700. The cubic root of 231113893 is about 613.6800677742.

The spelling of 231113893 in words is "two hundred thirty-one million, one hundred thirteen thousand, eight hundred ninety-three".