249875279 has 16 divisors (see below), whose sum is σ = 263391744. Its totient is φ = 236779200.

The previous prime is 249875257. The next prime is 249875287. The reversal of 249875279 is 972578942.

It is a cyclic number.

It is not a de Polignac number, because 249875279 - 2²⁰ = 248826703 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 249875279.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249875209) 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 in 15 ways as a sum of consecutive naturals, for example, 477512 + ... + 478034.

It is an arithmetic number, because the mean of its divisors is an integer number (16461984).

Almost surely, 2^249875279 is an apocalyptic number.

249875279 is a deficient number, since it is larger than the sum of its proper divisors (13516465).

249875279 is a wasteful number, since it uses less digits than its factorization.

249875279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878.

The product of its digits is 2540160, while the sum is 53.

The square root of 249875279 is about 15807.4437844960. The cubic root of 249875279 is about 629.8557484462.

It can be divided in two parts, 2498 and 75279, that added together give a palindrome (77777).

The spelling of 249875279 in words is "two hundred forty-nine million, eight hundred seventy-five thousand, two hundred seventy-nine".