249976013 has 4 divisors (see below), whose sum is σ = 285686880. Its totient is φ = 214265148.

The previous prime is 249976009. The next prime is 249976043. The reversal of 249976013 is 310679942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 249976013 - 2² = 249976009 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 (249976003) 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, 17855423 + ... + 17855436.

It is an arithmetic number, because the mean of its divisors is an integer number (71421720).

Almost surely, 2^249976013 is an apocalyptic number.

It is an amenable number.

249976013 is a deficient number, since it is larger than the sum of its proper divisors (35710867).

249976013 is an equidigital number, since it uses as much as digits as its factorization.

249976013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35710866.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 249976013 is about 15810.6297471037. The cubic root of 249976013 is about 629.9403764855.

The spelling of 249976013 in words is "two hundred forty-nine million, nine hundred seventy-six thousand, thirteen".