249885965 has 16 divisors (see below), whose sum is σ = 343139328. Its totient is φ = 171131136.

The previous prime is 249885949. The next prime is 249885971. The reversal of 249885965 is 569588942.

It is a cyclic number.

It is not a de Polignac number, because 249885965 - 2⁴ = 249885949 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 249885965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26069 + ... + 34341.

It is an arithmetic number, because the mean of its divisors is an integer number (21446208).

Almost surely, 2^249885965 is an apocalyptic number.

It is an amenable number.

249885965 is a deficient number, since it is larger than the sum of its proper divisors (93253363).

249885965 is an equidigital number, since it uses as much as digits as its factorization.

249885965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9148.

The product of its digits is 6220800, while the sum is 56.

The square root of 249885965 is about 15807.7817861963. The cubic root of 249885965 is about 629.8647269822.

The spelling of 249885965 in words is "two hundred forty-nine million, eight hundred eighty-five thousand, nine hundred sixty-five".