231329297 has 2 divisors, whose sum is σ = 231329298. Its totient is φ = 231329296.

The previous prime is 231329279. The next prime is 231329311. The reversal of 231329297 is 792923132.

231329297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

Together with previous prime (231329279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230918416 + 410881 = 15196^2 + 641^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231329297 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231329297.

It is not a weakly prime, because it can be changed into another prime (231329797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115664648 + 115664649.

It is an arithmetic number, because the mean of its divisors is an integer number (115664649).

Almost surely, 2^231329297 is an apocalyptic number.

It is an amenable number.

231329297 is a deficient number, since it is larger than the sum of its proper divisors (1).

231329297 is an equidigital number, since it uses as much as digits as its factorization.

231329297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 38.

The square root of 231329297 is about 15209.5133715711. The cubic root of 231329297 is about 613.8706636935.

The spelling of 231329297 in words is "two hundred thirty-one million, three hundred twenty-nine thousand, two hundred ninety-seven".