231327913 has 2 divisors, whose sum is σ = 231327914. Its totient is φ = 231327912.

The previous prime is 231327871. The next prime is 231327919. The reversal of 231327913 is 319723132.

It is a happy number.

231327913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229916569 + 1411344 = 15163^2 + 1188^2 .

It is a cyclic number.

It is not a de Polignac number, because 231327913 - 2¹³ = 231319721 is a prime.

It is not a weakly prime, because it can be changed into another prime (231327919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115663956 + 115663957.

It is an arithmetic number, because the mean of its divisors is an integer number (115663957).

Almost surely, 2^231327913 is an apocalyptic number.

It is an amenable number.

231327913 is a deficient number, since it is larger than the sum of its proper divisors (1).

231327913 is an equidigital number, since it uses as much as digits as its factorization.

231327913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 31.

The square root of 231327913 is about 15209.4678736634. The cubic root of 231327913 is about 613.8694394666.

The spelling of 231327913 in words is "two hundred thirty-one million, three hundred twenty-seven thousand, nine hundred thirteen".