230561987 has 2 divisors, whose sum is σ = 230561988. Its totient is φ = 230561986.

The previous prime is 230561971. The next prime is 230561999. The reversal of 230561987 is 789165032.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 230561987 - 2⁴ = 230561971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (230561917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115280993 + 115280994.

It is an arithmetic number, because the mean of its divisors is an integer number (115280994).

Almost surely, 2^230561987 is an apocalyptic number.

230561987 is a deficient number, since it is larger than the sum of its proper divisors (1).

230561987 is an equidigital number, since it uses as much as digits as its factorization.

230561987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 230561987 is about 15184.2677465856. The cubic root of 230561987 is about 613.1911837461.

The spelling of 230561987 in words is "two hundred thirty million, five hundred sixty-one thousand, nine hundred eighty-seven".