259407643 has 4 divisors (see below), whose sum is σ = 282990168. Its totient is φ = 235825120.

The previous prime is 259407637. The next prime is 259407653. The reversal of 259407643 is 346704952.

It is a happy number.

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 259407643 - 2⁵ = 259407611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 259407596 and 259407605.

It is not an unprimeable number, because it can be changed into a prime (259407653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11791246 + ... + 11791267.

It is an arithmetic number, because the mean of its divisors is an integer number (70747542).

Almost surely, 2^259407643 is an apocalyptic number.

259407643 is a deficient number, since it is larger than the sum of its proper divisors (23582525).

259407643 is a wasteful number, since it uses less digits than its factorization.

259407643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23582524.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 259407643 is about 16106.1368117870. The cubic root of 259407643 is about 637.7653534835.

The spelling of 259407643 in words is "two hundred fifty-nine million, four hundred seven thousand, six hundred forty-three".