744349721 has 2 divisors, whose sum is σ = 744349722. Its totient is φ = 744349720.

The previous prime is 744349703. The next prime is 744349733. The reversal of 744349721 is 127943447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 744198400 + 151321 = 27280^2 + 389^2 .

It is a cyclic number.

It is not a de Polignac number, because 744349721 - 2⁶ = 744349657 is a prime.

It is not a weakly prime, because it can be changed into another prime (744349751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372174860 + 372174861.

It is an arithmetic number, because the mean of its divisors is an integer number (372174861).

Almost surely, 2^744349721 is an apocalyptic number.

It is an amenable number.

744349721 is a deficient number, since it is larger than the sum of its proper divisors (1).

744349721 is an equidigital number, since it uses as much as digits as its factorization.

744349721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 41.

The square root of 744349721 is about 27282.7733377676. The cubic root of 744349721 is about 906.2729341418.

The spelling of 744349721 in words is "seven hundred forty-four million, three hundred forty-nine thousand, seven hundred twenty-one".