239980987 has 2 divisors, whose sum is σ = 239980988. Its totient is φ = 239980986.

The previous prime is 239980981. The next prime is 239980997. The reversal of 239980987 is 789089932.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 239980987 - 2¹¹ = 239978939 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (239980981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119990493 + 119990494.

It is an arithmetic number, because the mean of its divisors is an integer number (119990494).

Almost surely, 2^239980987 is an apocalyptic number.

239980987 is a deficient number, since it is larger than the sum of its proper divisors (1).

239980987 is an equidigital number, since it uses as much as digits as its factorization.

239980987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The square root of 239980987 is about 15491.3197307395. The cubic root of 239980987 is about 621.4300902542.

The spelling of 239980987 in words is "two hundred thirty-nine million, nine hundred eighty thousand, nine hundred eighty-seven".