944388689 has 2 divisors, whose sum is σ = 944388690. Its totient is φ = 944388688.

The previous prime is 944388617. The next prime is 944388727. The reversal of 944388689 is 986883449.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 814246225 + 130142464 = 28535^2 + 11408^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-944388689 is a prime.

It is a super-2 number, since 2×944388689² = 1783739991822277442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (944388089) 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, 472194344 + 472194345.

It is an arithmetic number, because the mean of its divisors is an integer number (472194345).

Almost surely, 2^944388689 is an apocalyptic number.

It is an amenable number.

944388689 is a deficient number, since it is larger than the sum of its proper divisors (1).

944388689 is an equidigital number, since it uses as much as digits as its factorization.

944388689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11943936, while the sum is 59.

The square root of 944388689 is about 30730.9077151977. The cubic root of 944388689 is about 981.1082454212.

The spelling of 944388689 in words is "nine hundred forty-four million, three hundred eighty-eight thousand, six hundred eighty-nine".