259878995 has 4 divisors (see below), whose sum is σ = 311854800. Its totient is φ = 207903192.

The previous prime is 259878989. The next prime is 259879013. The reversal of 259878995 is 599878952.

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 259878995 - 2⁸ = 259878739 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25987895 + ... + 25987904.

It is an arithmetic number, because the mean of its divisors is an integer number (77963700).

Almost surely, 2^259878995 is an apocalyptic number.

259878995 is a deficient number, since it is larger than the sum of its proper divisors (51975805).

259878995 is an equidigital number, since it uses as much as digits as its factorization.

259878995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51975804.

The product of its digits is 16329600, while the sum is 62.

The square root of 259878995 is about 16120.7628541580. The cubic root of 259878995 is about 638.1513997864.

The spelling of 259878995 in words is "two hundred fifty-nine million, eight hundred seventy-eight thousand, nine hundred ninety-five".