231329279 has 2 divisors, whose sum is σ = 231329280. Its totient is φ = 231329278.

The previous prime is 231329261. The next prime is 231329297. The reversal of 231329279 is 972923132.

Together with next prime (231329297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (231329261) and next prime (231329297).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231329279 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231325279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115664639 + 115664640.

It is an arithmetic number, because the mean of its divisors is an integer number (115664640).

Almost surely, 2^231329279 is an apocalyptic number.

231329279 is a deficient number, since it is larger than the sum of its proper divisors (1).

231329279 is an equidigital number, since it uses as much as digits as its factorization.

231329279 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 231329279 is about 15209.5127798362. The cubic root of 231329279 is about 613.8706477715.

The spelling of 231329279 in words is "two hundred thirty-one million, three hundred twenty-nine thousand, two hundred seventy-nine".