244663993 has 4 divisors (see below), whose sum is σ = 279616000. Its totient is φ = 209711988.

The previous prime is 244663987. The next prime is 244664003. The reversal of 244663993 is 399366442.

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, and also an emirpimes, since its reverse is a distinct semiprime: 399366442 = 2 ⋅199683221.

It is a cyclic number.

It is not a de Polignac number, because 244663993 - 2⁵ = 244663961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (244663963) 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, 17475993 + ... + 17476006.

It is an arithmetic number, because the mean of its divisors is an integer number (69904000).

Almost surely, 2^244663993 is an apocalyptic number.

It is an amenable number.

244663993 is a deficient number, since it is larger than the sum of its proper divisors (34952007).

244663993 is an equidigital number, since it uses as much as digits as its factorization.

244663993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34952006.

The product of its digits is 839808, while the sum is 46.

The square root of 244663993 is about 15641.7388099917. The cubic root of 244663993 is about 625.4462886065.

The spelling of 244663993 in words is "two hundred forty-four million, six hundred sixty-three thousand, nine hundred ninety-three".