744621289 has 2 divisors, whose sum is σ = 744621290. Its totient is φ = 744621288.

The previous prime is 744621257. The next prime is 744621407. The reversal of 744621289 is 982126447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 713317264 + 31304025 = 26708^2 + 5595^2 .

It is a cyclic number.

It is not a de Polignac number, because 744621289 - 2⁵ = 744621257 is a prime.

It is not a weakly prime, because it can be changed into another prime (744621589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372310644 + 372310645.

It is an arithmetic number, because the mean of its divisors is an integer number (372310645).

Almost surely, 2^744621289 is an apocalyptic number.

It is an amenable number.

744621289 is a deficient number, since it is larger than the sum of its proper divisors (1).

744621289 is an equidigital number, since it uses as much as digits as its factorization.

744621289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 43.

The square root of 744621289 is about 27287.7497972992. The cubic root of 744621289 is about 906.3831353893.

The spelling of 744621289 in words is "seven hundred forty-four million, six hundred twenty-one thousand, two hundred eighty-nine".