249638383 has 4 divisors (see below), whose sum is σ = 251971560. Its totient is φ = 247305208.

The previous prime is 249638377. The next prime is 249638399. The reversal of 249638383 is 383836942.

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 249638383 - 2¹³ = 249630191 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 (249638783) 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, 1166428 + ... + 1166641.

It is an arithmetic number, because the mean of its divisors is an integer number (62992890).

Almost surely, 2^249638383 is an apocalyptic number.

249638383 is a deficient number, since it is larger than the sum of its proper divisors (2333177).

249638383 is a wasteful number, since it uses less digits than its factorization.

249638383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333176.

The product of its digits is 746496, while the sum is 46.

The square root of 249638383 is about 15799.9488290311. The cubic root of 249638383 is about 629.6566391331.

The spelling of 249638383 in words is "two hundred forty-nine million, six hundred thirty-eight thousand, three hundred eighty-three".