239940813649687 has 2 divisors, whose sum is σ = 239940813649688. Its totient is φ = 239940813649686.

The previous prime is 239940813649639. The next prime is 239940813649699. The reversal of 239940813649687 is 786946318049932.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 239940813649687 - 2³¹ = 239938666166039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239940813619687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119970406824843 + 119970406824844.

It is an arithmetic number, because the mean of its divisors is an integer number (119970406824844).

Almost surely, 2^{239940813649687} is an apocalyptic number.

239940813649687 is a deficient number, since it is larger than the sum of its proper divisors (1).

239940813649687 is an equidigital number, since it uses as much as digits as its factorization.

239940813649687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3386105856, while the sum is 79.

The spelling of 239940813649687 in words is "two hundred thirty-nine trillion, nine hundred forty billion, eight hundred thirteen million, six hundred forty-nine thousand, six hundred eighty-seven".