230331389 has 2 divisors, whose sum is σ = 230331390. Its totient is φ = 230331388.

The previous prime is 230331347. The next prime is 230331421. The reversal of 230331389 is 983133032.

It is an a-pointer prime, because the next prime (230331421) can be obtained adding 230331389 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177768889 + 52562500 = 13333^2 + 7250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230331389 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230331289) 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, 115165694 + 115165695.

It is an arithmetic number, because the mean of its divisors is an integer number (115165695).

Almost surely, 2^230331389 is an apocalyptic number.

It is an amenable number.

230331389 is a deficient number, since it is larger than the sum of its proper divisors (1).

230331389 is an equidigital number, since it uses as much as digits as its factorization.

230331389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 230331389 is about 15176.6725272703. The cubic root of 230331389 is about 612.9866865672.

The spelling of 230331389 in words is "two hundred thirty million, three hundred thirty-one thousand, three hundred eighty-nine".