259998499 has 2 divisors, whose sum is σ = 259998500. Its totient is φ = 259998498.

The previous prime is 259998491. The next prime is 259998503. The reversal of 259998499 is 994899952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 259998499 - 2³ = 259998491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 259998499.

It is not a weakly prime, because it can be changed into another prime (259998491) by changing a digit.

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 as a sum of consecutive naturals, namely, 129999249 + 129999250.

It is an arithmetic number, because the mean of its divisors is an integer number (129999250).

Almost surely, 2^259998499 is an apocalyptic number.

259998499 is a deficient number, since it is larger than the sum of its proper divisors (1).

259998499 is an equidigital number, since it uses as much as digits as its factorization.

259998499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18895680, while the sum is 64.

The square root of 259998499 is about 16124.4689524958. The cubic root of 259998499 is about 638.2492016607.

The spelling of 259998499 in words is "two hundred fifty-nine million, nine hundred ninety-eight thousand, four hundred ninety-nine".