259397643 has 4 divisors (see below), whose sum is σ = 345863528. Its totient is φ = 172931760.

The previous prime is 259397641. The next prime is 259397651. The reversal of 259397643 is 346793952.

It is a happy number.

259397643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 259397643 - 2¹ = 259397641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 259397592 and 259397601.

It is not an unprimeable number, because it can be changed into a prime (259397641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43232938 + ... + 43232943.

It is an arithmetic number, because the mean of its divisors is an integer number (86465882).

Almost surely, 2^259397643 is an apocalyptic number.

259397643 is a deficient number, since it is larger than the sum of its proper divisors (86465885).

259397643 is an equidigital number, since it uses as much as digits as its factorization.

259397643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86465884.

The product of its digits is 1224720, while the sum is 48.

The square root of 259397643 is about 16105.8263681191. The cubic root of 259397643 is about 637.7571582283.

The spelling of 259397643 in words is "two hundred fifty-nine million, three hundred ninety-seven thousand, six hundred forty-three".