259661743 has 8 divisors (see below), whose sum is σ = 295583616. Its totient is φ = 225792600.

The previous prime is 259661729. The next prime is 259661747. The reversal of 259661743 is 347166952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-259661743 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 259661743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259661747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 512913 + ... + 513418.

It is an arithmetic number, because the mean of its divisors is an integer number (36947952).

Almost surely, 2^259661743 is an apocalyptic number.

259661743 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

259661743 is a deficient number, since it is larger than the sum of its proper divisors (35921873).

259661743 is a wasteful number, since it uses less digits than its factorization.

259661743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026365.

The product of its digits is 272160, while the sum is 43.

The square root of 259661743 is about 16114.0231785858. The cubic root of 259661743 is about 637.9735242860.

The spelling of 259661743 in words is "two hundred fifty-nine million, six hundred sixty-one thousand, seven hundred forty-three".