249982985 has 8 divisors (see below), whose sum is σ = 342833856. Its totient is φ = 171416880.

The previous prime is 249982961. The next prime is 249982991. The reversal of 249982985 is 589289942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 249982985 - 2⁶ = 249982921 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249982985.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3571151 + ... + 3571220.

It is an arithmetic number, because the mean of its divisors is an integer number (42854232).

Almost surely, 2^249982985 is an apocalyptic number.

It is an amenable number.

249982985 is a deficient number, since it is larger than the sum of its proper divisors (92850871).

249982985 is an equidigital number, since it uses as much as digits as its factorization.

249982985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7142383.

The product of its digits is 3732480, while the sum is 56.

The square root of 249982985 is about 15810.8502301426. The cubic root of 249982985 is about 629.9462329188.

The spelling of 249982985 in words is "two hundred forty-nine million, nine hundred eighty-two thousand, nine hundred eighty-five".