744640493 has 2 divisors, whose sum is σ = 744640494. Its totient is φ = 744640492.

The previous prime is 744640469. The next prime is 744640531. The reversal of 744640493 is 394046447.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 726679849 + 17960644 = 26957^2 + 4238^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-744640493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 744640493.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (744640423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372320246 + 372320247.

It is an arithmetic number, because the mean of its divisors is an integer number (372320247).

Almost surely, 2^744640493 is an apocalyptic number.

It is an amenable number.

744640493 is a deficient number, since it is larger than the sum of its proper divisors (1).

744640493 is an equidigital number, since it uses as much as digits as its factorization.

744640493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 41.

The square root of 744640493 is about 27288.1016745394. The cubic root of 744640493 is about 906.3909272840.

The spelling of 744640493 in words is "seven hundred forty-four million, six hundred forty thousand, four hundred ninety-three".