249940289 has 4 divisors (see below), whose sum is σ = 250060800. Its totient is φ = 249819780.

The previous prime is 249940253. The next prime is 249940297. The reversal of 249940289 is 982049942.

249940289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249940289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249940489) 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, 57089 + ... + 61310.

It is an arithmetic number, because the mean of its divisors is an integer number (62515200).

Almost surely, 2^249940289 is an apocalyptic number.

It is an amenable number.

249940289 is a deficient number, since it is larger than the sum of its proper divisors (120511).

249940289 is a wasteful number, since it uses less digits than its factorization.

249940289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120510.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 249940289 is about 15809.4999604668. The cubic root of 249940289 is about 629.9103668567.

It can be divided in two parts, 2499402 and 89, that multiplied together give a triangular number (222446778 = T₂₁₀₉₂).

The spelling of 249940289 in words is "two hundred forty-nine million, nine hundred forty thousand, two hundred eighty-nine".