744631889 has 2 divisors, whose sum is σ = 744631890. Its totient is φ = 744631888.

The previous prime is 744631847. The next prime is 744631897. The reversal of 744631889 is 988136447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 696537664 + 48094225 = 26392^2 + 6935^2 .

It is an emirp because it is prime and its reverse (988136447) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-744631889 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (744631189) 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, 372315944 + 372315945.

It is an arithmetic number, because the mean of its divisors is an integer number (372315945).

Almost surely, 2^744631889 is an apocalyptic number.

It is an amenable number.

744631889 is a deficient number, since it is larger than the sum of its proper divisors (1).

744631889 is an equidigital number, since it uses as much as digits as its factorization.

744631889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 50.

The square root of 744631889 is about 27287.9440229564. The cubic root of 744631889 is about 906.3874362850.

The spelling of 744631889 in words is "seven hundred forty-four million, six hundred thirty-one thousand, eight hundred eighty-nine".