244638913 has 2 divisors, whose sum is σ = 244638914. Its totient is φ = 244638912.

The previous prime is 244638899. The next prime is 244638929. The reversal of 244638913 is 319836442.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132871729 + 111767184 = 11527^2 + 10572^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-244638913 is a prime.

It is not a weakly prime, because it can be changed into another prime (244638973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122319456 + 122319457.

It is an arithmetic number, because the mean of its divisors is an integer number (122319457).

Almost surely, 2^244638913 is an apocalyptic number.

It is an amenable number.

244638913 is a deficient number, since it is larger than the sum of its proper divisors (1).

244638913 is an equidigital number, since it uses as much as digits as its factorization.

244638913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 40.

The square root of 244638913 is about 15640.9370882949. The cubic root of 244638913 is about 625.4249168077.

The spelling of 244638913 in words is "two hundred forty-four million, six hundred thirty-eight thousand, nine hundred thirteen".