244979621 has 4 divisors (see below), whose sum is σ = 249601932. Its totient is φ = 240357312.

The previous prime is 244979573. The next prime is 244979653. The reversal of 244979621 is 126979442.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 179935396 + 65044225 = 13414^2 + 8065^2 .

It is a cyclic number.

It is not a de Polignac number, because 244979621 - 2¹⁰ = 244978597 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 (244979681) 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, 2311076 + ... + 2311181.

It is an arithmetic number, because the mean of its divisors is an integer number (62400483).

Almost surely, 2^244979621 is an apocalyptic number.

It is an amenable number.

244979621 is a deficient number, since it is larger than the sum of its proper divisors (4622311).

244979621 is an equidigital number, since it uses as much as digits as its factorization.

244979621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4622310.

The product of its digits is 217728, while the sum is 44.

The square root of 244979621 is about 15651.8248456849. The cubic root of 244979621 is about 625.7151246959.

The spelling of 244979621 in words is "two hundred forty-four million, nine hundred seventy-nine thousand, six hundred twenty-one".