230618639 has 2 divisors, whose sum is σ = 230618640. Its totient is φ = 230618638.

The previous prime is 230618611. The next prime is 230618657. The reversal of 230618639 is 936816032.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 230618639 - 2¹² = 230614543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230612639) 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, 115309319 + 115309320.

It is an arithmetic number, because the mean of its divisors is an integer number (115309320).

Almost surely, 2^230618639 is an apocalyptic number.

230618639 is a deficient number, since it is larger than the sum of its proper divisors (1).

230618639 is an equidigital number, since it uses as much as digits as its factorization.

230618639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 230618639 is about 15186.1331154445. The cubic root of 230618639 is about 613.2414025796.

The spelling of 230618639 in words is "two hundred thirty million, six hundred eighteen thousand, six hundred thirty-nine".