249344621 has 4 divisors (see below), whose sum is σ = 249513792. Its totient is φ = 249175452.

The previous prime is 249344609. The next prime is 249344629. The reversal of 249344621 is 126443942.

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 a de Polignac number, because none of the positive numbers 2^k-249344621 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 (249344629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82355 + ... + 85328.

It is an arithmetic number, because the mean of its divisors is an integer number (62378448).

Almost surely, 2^249344621 is an apocalyptic number.

It is an amenable number.

249344621 is a deficient number, since it is larger than the sum of its proper divisors (169171).

249344621 is a wasteful number, since it uses less digits than its factorization.

249344621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169170.

The product of its digits is 41472, while the sum is 35.

The square root of 249344621 is about 15790.6497966360. The cubic root of 249344621 is about 629.4095593464.

The spelling of 249344621 in words is "two hundred forty-nine million, three hundred forty-four thousand, six hundred twenty-one".