249820399 has 4 divisors (see below), whose sum is σ = 250059600. Its totient is φ = 249581200.

The previous prime is 249820397. The next prime is 249820427. The reversal of 249820399 is 993028942.

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 249820399 - 2¹ = 249820397 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 (249820397) 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, 118027 + ... + 120124.

It is an arithmetic number, because the mean of its divisors is an integer number (62514900).

Almost surely, 2^249820399 is an apocalyptic number.

249820399 is a deficient number, since it is larger than the sum of its proper divisors (239201).

249820399 is a wasteful number, since it uses less digits than its factorization.

249820399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239200.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 249820399 is about 15805.7077981342. The cubic root of 249820399 is about 629.8096334210.

The spelling of 249820399 in words is "two hundred forty-nine million, eight hundred twenty thousand, three hundred ninety-nine".