249798859 has 4 divisors (see below), whose sum is σ = 249955720. Its totient is φ = 249642000.

The previous prime is 249798827. The next prime is 249798863. The reversal of 249798859 is 958897942.

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 249798859 - 2⁵ = 249798827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 249798797 and 249798806.

It is not an unprimeable number, because it can be changed into a prime (249798889) 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, 76017 + ... + 79234.

It is an arithmetic number, because the mean of its divisors is an integer number (62488930).

Almost surely, 2^249798859 is an apocalyptic number.

249798859 is a deficient number, since it is larger than the sum of its proper divisors (156861).

249798859 is a wasteful number, since it uses less digits than its factorization.

249798859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156860.

The product of its digits is 13063680, while the sum is 61.

The square root of 249798859 is about 15805.0263840337. The cubic root of 249798859 is about 629.7915317641.

The spelling of 249798859 in words is "two hundred forty-nine million, seven hundred ninety-eight thousand, eight hundred fifty-nine".