744648991 has 2 divisors, whose sum is σ = 744648992. Its totient is φ = 744648990.

The previous prime is 744648973. The next prime is 744648997. The reversal of 744648991 is 199846447.

744648991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (199846447) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 744648991 - 2¹¹ = 744646943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (744648997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372324495 + 372324496.

It is an arithmetic number, because the mean of its divisors is an integer number (372324496).

Almost surely, 2^744648991 is an apocalyptic number.

744648991 is a deficient number, since it is larger than the sum of its proper divisors (1).

744648991 is an equidigital number, since it uses as much as digits as its factorization.

744648991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 52.

The square root of 744648991 is about 27288.2573829844. The cubic root of 744648991 is about 906.3943752480.

The spelling of 744648991 in words is "seven hundred forty-four million, six hundred forty-eight thousand, nine hundred ninety-one".