230705287 has 2 divisors, whose sum is σ = 230705288. Its totient is φ = 230705286.

The previous prime is 230705261. The next prime is 230705297. The reversal of 230705287 is 782507032.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230705287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230705227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115352643 + 115352644.

It is an arithmetic number, because the mean of its divisors is an integer number (115352644).

Almost surely, 2^230705287 is an apocalyptic number.

230705287 is a deficient number, since it is larger than the sum of its proper divisors (1).

230705287 is an equidigital number, since it uses as much as digits as its factorization.

230705287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 230705287 is about 15188.9857133385. The cubic root of 230705287 is about 613.3181952851.

The spelling of 230705287 in words is "two hundred thirty million, seven hundred five thousand, two hundred eighty-seven".