231430123 has 2 divisors, whose sum is σ = 231430124. Its totient is φ = 231430122.

The previous prime is 231430099. The next prime is 231430139. The reversal of 231430123 is 321034132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231430123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231430123.

It is not a weakly prime, because it can be changed into another prime (231430183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115715061 + 115715062.

It is an arithmetic number, because the mean of its divisors is an integer number (115715062).

Almost surely, 2^231430123 is an apocalyptic number.

231430123 is a deficient number, since it is larger than the sum of its proper divisors (1).

231430123 is an equidigital number, since it uses as much as digits as its factorization.

231430123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 231430123 is about 15212.8275806965. The cubic root of 231430123 is about 613.9598369114.

Adding to 231430123 its reverse (321034132), we get a palindrome (552464255).

The spelling of 231430123 in words is "two hundred thirty-one million, four hundred thirty thousand, one hundred twenty-three".