244646989 has 2 divisors, whose sum is σ = 244646990. Its totient is φ = 244646988.

The previous prime is 244646953. The next prime is 244647001. The reversal of 244646989 is 989646442.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 242269225 + 2377764 = 15565^2 + 1542^2 .

It is a cyclic number.

It is not a de Polignac number, because 244646989 - 2¹⁵ = 244614221 is a prime.

It is a super-2 number, since 2×244646989² = 119704298453532242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (244646189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122323494 + 122323495.

It is an arithmetic number, because the mean of its divisors is an integer number (122323495).

Almost surely, 2^244646989 is an apocalyptic number.

It is an amenable number.

244646989 is a deficient number, since it is larger than the sum of its proper divisors (1).

244646989 is an equidigital number, since it uses as much as digits as its factorization.

244646989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2985984, while the sum is 52.

The square root of 244646989 is about 15641.1952548391. The cubic root of 244646989 is about 625.4317988908.

The spelling of 244646989 in words is "two hundred forty-four million, six hundred forty-six thousand, nine hundred eighty-nine".