259981913 has 8 divisors (see below), whose sum is σ = 266340096. Its totient is φ = 253638000.

The previous prime is 259981889. The next prime is 259981933. The reversal of 259981913 is 319189952.

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

It is a cyclic number.

It is not a de Polignac number, because 259981913 - 2⁶ = 259981849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (259981933) 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, 39563 + ... + 45663.

It is an arithmetic number, because the mean of its divisors is an integer number (33292512).

Almost surely, 2^259981913 is an apocalyptic number.

It is an amenable number.

259981913 is a deficient number, since it is larger than the sum of its proper divisors (6358183).

259981913 is an equidigital number, since it uses as much as digits as its factorization.

259981913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7135.

The product of its digits is 174960, while the sum is 47.

The square root of 259981913 is about 16123.9546327816. The cubic root of 259981913 is about 638.2356294972.

The spelling of 259981913 in words is "two hundred fifty-nine million, nine hundred eighty-one thousand, nine hundred thirteen".