744926561 has 2 divisors, whose sum is σ = 744926562. Its totient is φ = 744926560.

The previous prime is 744926537. The next prime is 744926563. The reversal of 744926561 is 165629447.

744926561 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 can be written as a sum of positive squares in only one way, i.e., 735440161 + 9486400 = 27119^2 + 3080^2 .

It is an emirp because it is prime and its reverse (165629447) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-744926561 is a prime.

Together with 744926563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (744926563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372463280 + 372463281.

It is an arithmetic number, because the mean of its divisors is an integer number (372463281).

Almost surely, 2^744926561 is an apocalyptic number.

It is an amenable number.

744926561 is a deficient number, since it is larger than the sum of its proper divisors (1).

744926561 is an equidigital number, since it uses as much as digits as its factorization.

744926561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 744926561 is about 27293.3427963670. The cubic root of 744926561 is about 906.5069816062.

The spelling of 744926561 in words is "seven hundred forty-four million, nine hundred twenty-six thousand, five hundred sixty-one".