249988013 has 8 divisors (see below), whose sum is σ = 272962656. Its totient is φ = 227054800.

The previous prime is 249988007. The next prime is 249988019. The reversal of 249988013 is 310889942.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (249988007) and next prime (249988019).

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

It is a cyclic number.

It is not a de Polignac number, because 249988013 - 2²⁰ = 248939437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249988019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3023 + ... + 22563.

It is an arithmetic number, because the mean of its divisors is an integer number (34120332).

Almost surely, 2^249988013 is an apocalyptic number.

It is an amenable number.

249988013 is a deficient number, since it is larger than the sum of its proper divisors (22974643).

249988013 is a wasteful number, since it uses less digits than its factorization.

249988013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20715.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 249988013 is about 15811.0092340748. The cubic root of 249988013 is about 629.9504563374.

The spelling of 249988013 in words is "two hundred forty-nine million, nine hundred eighty-eight thousand, thirteen".