249989589 has 12 divisors (see below), whose sum is σ = 361342956. Its totient is φ = 166545792.

The previous prime is 249989567. The next prime is 249989617. The reversal of 249989589 is 985989942.

249989589 is a `hidden beast` number, since 2 + 49 + 9 + 8 + 9 + 589 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 52446564 + 197543025 = 7242^2 + 14055^2 .

It is not a de Polignac number, because 249989589 - 2¹³ = 249981397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249989189) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5677 + ... + 23069.

It is an arithmetic number, because the mean of its divisors is an integer number (30111913).

Almost surely, 2^249989589 is an apocalyptic number.

It is an amenable number.

249989589 is a deficient number, since it is larger than the sum of its proper divisors (111353367).

249989589 is a wasteful number, since it uses less digits than its factorization.

249989589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18996 (or 18993 counting only the distinct ones).

The product of its digits is 16796160, while the sum is 63.

The square root of 249989589 is about 15811.0590726871. The cubic root of 249989589 is about 629.9517801340.

The spelling of 249989589 in words is "two hundred forty-nine million, nine hundred eighty-nine thousand, five hundred eighty-nine".