259413661 has 4 divisors (see below), whose sum is σ = 279368572. Its totient is φ = 239458752.

The previous prime is 259413617. The next prime is 259413701. The reversal of 259413661 is 166314952.

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

It can be written as a sum of positive squares in 2 ways, for example, as 69139225 + 190274436 = 8315^2 + 13794^2 .

It is a de Polignac number, because none of the positive numbers 2^k-259413661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 259413661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259413361) 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, 9977436 + ... + 9977461.

It is an arithmetic number, because the mean of its divisors is an integer number (69842143).

Almost surely, 2^259413661 is an apocalyptic number.

It is an amenable number.

259413661 is a deficient number, since it is larger than the sum of its proper divisors (19954911).

259413661 is a wasteful number, since it uses less digits than its factorization.

259413661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19954910.

The product of its digits is 38880, while the sum is 37.

The square root of 259413661 is about 16106.3236339023. The cubic root of 259413661 is about 637.7702852866.

The spelling of 259413661 in words is "two hundred fifty-nine million, four hundred thirteen thousand, six hundred sixty-one".