249318887 has 4 divisors (see below), whose sum is σ = 257916120. Its totient is φ = 240721656.

The previous prime is 249318857. The next prime is 249318899. The reversal of 249318887 is 788813942.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 249318887 - 2¹⁴ = 249302503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249318857) 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, 4298573 + ... + 4298630.

It is an arithmetic number, because the mean of its divisors is an integer number (64479030).

Almost surely, 2^249318887 is an apocalyptic number.

249318887 is a deficient number, since it is larger than the sum of its proper divisors (8597233).

249318887 is an equidigital number, since it uses as much as digits as its factorization.

249318887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8597232.

The product of its digits is 774144, while the sum is 50.

The square root of 249318887 is about 15789.8349263062. The cubic root of 249318887 is about 629.3879055368.

The spelling of 249318887 in words is "two hundred forty-nine million, three hundred eighteen thousand, eight hundred eighty-seven".