259994643 has 4 divisors (see below), whose sum is σ = 346659528. Its totient is φ = 173329760.

The previous prime is 259994633. The next prime is 259994711. The reversal of 259994643 is 346499952.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 259994643 - 2⁸ = 259994387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (259994633) 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 in 3 ways as a sum of consecutive naturals, for example, 43332438 + ... + 43332443.

It is an arithmetic number, because the mean of its divisors is an integer number (86664882).

Almost surely, 2^259994643 is an apocalyptic number.

259994643 is a deficient number, since it is larger than the sum of its proper divisors (86664885).

259994643 is an equidigital number, since it uses as much as digits as its factorization.

259994643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86664884.

The product of its digits is 2099520, while the sum is 51.

The square root of 259994643 is about 16124.3493822231. The cubic root of 259994643 is about 638.2460463847.

The spelling of 259994643 in words is "two hundred fifty-nine million, nine hundred ninety-four thousand, six hundred forty-three".