744011621 has 2 divisors, whose sum is σ = 744011622. Its totient is φ = 744011620.

The previous prime is 744011603. The next prime is 744011623. The reversal of 744011621 is 126110447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 501088225 + 242923396 = 22385^2 + 15586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-744011621 is a prime.

Together with 744011623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (744011623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372005810 + 372005811.

It is an arithmetic number, because the mean of its divisors is an integer number (372005811).

Almost surely, 2^744011621 is an apocalyptic number.

It is an amenable number.

744011621 is a deficient number, since it is larger than the sum of its proper divisors (1).

744011621 is an equidigital number, since it uses as much as digits as its factorization.

744011621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 744011621 is about 27276.5764164053. The cubic root of 744011621 is about 906.1356970004.

The spelling of 744011621 in words is "seven hundred forty-four million, eleven thousand, six hundred twenty-one".