249988887 has 12 divisors (see below), whose sum is σ = 361915944. Its totient is φ = 166280400.

The previous prime is 249988873. The next prime is 249988889. The reversal of 249988887 is 788889942.

It is a happy number.

It is not a de Polignac number, because 249988887 - 2¹⁰ = 249987863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249988889) 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, 27364 + ... + 35337.

It is an arithmetic number, because the mean of its divisors is an integer number (30159662).

Almost surely, 2^249988887 is an apocalyptic number.

249988887 is a deficient number, since it is larger than the sum of its proper divisors (111927057).

249988887 is a wasteful number, since it uses less digits than its factorization.

249988887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63150 (or 63147 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 63.

The square root of 249988887 is about 15811.0368730201. The cubic root of 249988887 is about 629.9511904740.

The spelling of 249988887 in words is "two hundred forty-nine million, nine hundred eighty-eight thousand, eight hundred eighty-seven".