249393863 has 4 divisors (see below), whose sum is σ = 249459168. Its totient is φ = 249328560.

The previous prime is 249393847. The next prime is 249393877. The reversal of 249393863 is 368393942.

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 249393863 - 2⁴ = 249393847 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 (249393883) 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, 26543 + ... + 34688.

It is an arithmetic number, because the mean of its divisors is an integer number (62364792).

Almost surely, 2^249393863 is an apocalyptic number.

249393863 is a deficient number, since it is larger than the sum of its proper divisors (65305).

249393863 is an equidigital number, since it uses as much as digits as its factorization.

249393863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65304.

The product of its digits is 839808, while the sum is 47.

The square root of 249393863 is about 15792.2089335216. The cubic root of 249393863 is about 629.4509897508.

The spelling of 249393863 in words is "two hundred forty-nine million, three hundred ninety-three thousand, eight hundred sixty-three".