249579849 has 4 divisors (see below), whose sum is σ = 332773136. Its totient is φ = 166386564.

The previous prime is 249579817. The next prime is 249579857. The reversal of 249579849 is 948975942.

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 not a de Polignac number, because 249579849 - 2⁵ = 249579817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (249579859) 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, 41596639 + ... + 41596644.

It is an arithmetic number, because the mean of its divisors is an integer number (83193284).

Almost surely, 2^249579849 is an apocalyptic number.

It is an amenable number.

249579849 is a deficient number, since it is larger than the sum of its proper divisors (83193287).

249579849 is an equidigital number, since it uses as much as digits as its factorization.

249579849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83193286.

The product of its digits is 6531840, while the sum is 57.

The square root of 249579849 is about 15798.0963726647. The cubic root of 249579849 is about 629.6074223389.

The spelling of 249579849 in words is "two hundred forty-nine million, five hundred seventy-nine thousand, eight hundred forty-nine".