259938643 has 2 divisors, whose sum is σ = 259938644. Its totient is φ = 259938642.

The previous prime is 259938611. The next prime is 259938671. The reversal of 259938643 is 346839952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 259938643 - 2⁵ = 259938611 is a prime.

It is not a weakly prime, because it can be changed into another prime (259938443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129969321 + 129969322.

It is an arithmetic number, because the mean of its divisors is an integer number (129969322).

Almost surely, 2^259938643 is an apocalyptic number.

259938643 is a deficient number, since it is larger than the sum of its proper divisors (1).

259938643 is an equidigital number, since it uses as much as digits as its factorization.

259938643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 49.

The square root of 259938643 is about 16122.6127845334. The cubic root of 259938643 is about 638.2002193571.

The spelling of 259938643 in words is "two hundred fifty-nine million, nine hundred thirty-eight thousand, six hundred forty-three".