230639489 has 2 divisors, whose sum is σ = 230639490. Its totient is φ = 230639488.

The previous prime is 230639483. The next prime is 230639501. The reversal of 230639489 is 984936032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174689089 + 55950400 = 13217^2 + 7480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230639489 is a prime.

It is a super-2 number, since 2×230639489² = 106389147772362242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (230639483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115319744 + 115319745.

It is an arithmetic number, because the mean of its divisors is an integer number (115319745).

Almost surely, 2^230639489 is an apocalyptic number.

It is an amenable number.

230639489 is a deficient number, since it is larger than the sum of its proper divisors (1).

230639489 is an equidigital number, since it uses as much as digits as its factorization.

230639489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 279936, while the sum is 44.

The square root of 230639489 is about 15186.8195814660. The cubic root of 230639489 is about 613.2598828696.

The spelling of 230639489 in words is "two hundred thirty million, six hundred thirty-nine thousand, four hundred eighty-nine".