744640573 has 2 divisors, whose sum is σ = 744640574. Its totient is φ = 744640572.

The previous prime is 744640531. The next prime is 744640583. The reversal of 744640573 is 375046447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 570875449 + 173765124 = 23893^2 + 13182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-744640573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (744640583) 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, 372320286 + 372320287.

It is an arithmetic number, because the mean of its divisors is an integer number (372320287).

Almost surely, 2^744640573 is an apocalyptic number.

It is an amenable number.

744640573 is a deficient number, since it is larger than the sum of its proper divisors (1).

744640573 is an equidigital number, since it uses as much as digits as its factorization.

744640573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 40.

The square root of 744640573 is about 27288.1031403797. The cubic root of 744640573 is about 906.3909597432.

The spelling of 744640573 in words is "seven hundred forty-four million, six hundred forty thousand, five hundred seventy-three".