249741987 has 16 divisors (see below), whose sum is σ = 365444352. Its totient is φ = 150449120.

The previous prime is 249741977. The next prime is 249742001. The reversal of 249741987 is 789147942.

249741987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 249741987 - 2¹¹ = 249739939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249741977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17148 + ... + 28169.

It is an arithmetic number, because the mean of its divisors is an integer number (22840272).

Almost surely, 2^249741987 is an apocalyptic number.

249741987 is a deficient number, since it is larger than the sum of its proper divisors (115702365).

249741987 is a wasteful number, since it uses less digits than its factorization.

249741987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45498.

The product of its digits is 1016064, while the sum is 51.

The square root of 249741987 is about 15803.2271071449. The cubic root of 249741987 is about 629.7437330102.

The spelling of 249741987 in words is "two hundred forty-nine million, seven hundred forty-one thousand, nine hundred eighty-seven".