250989 has 4 divisors (see below), whose sum is σ = 334656. Its totient is φ = 167324.

The previous prime is 250979. The next prime is 250993. The reversal of 250989 is 989052.

250989 is digitally balanced in base 7, 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 not a de Polignac number, because 250989 - 2¹³ = 242797 is a prime.

It is an Ulam number.

It is a D-number.

It is an alternating number because its digits alternate between even and odd.

250989 is strictly pandigital in base 7.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 250989.

It is not an unprimeable number, because it can be changed into a prime (250919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41829 + ... + 41834.

It is an arithmetic number, because the mean of its divisors is an integer number (83664).

2²⁵⁰⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

250989 is a deficient number, since it is larger than the sum of its proper divisors (83667).

250989 is an equidigital number, since it uses as much as digits as its factorization.

250989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83666.

The product of its (nonzero) digits is 6480, while the sum is 33.

The square root of 250989 is about 500.9880238090. The cubic root of 250989 is about 63.0790139867.

The spelling of 250989 in words is "two hundred fifty thousand, nine hundred eighty-nine".