744671021 has 2 divisors, whose sum is σ = 744671022. Its totient is φ = 744671020.

The previous prime is 744670963. The next prime is 744671051. The reversal of 744671021 is 120176447.

744671021 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., 450033796 + 294637225 = 21214^2 + 17165^2 .

It is a cyclic number.

It is not a de Polignac number, because 744671021 - 2²⁶ = 677562157 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (744671051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372335510 + 372335511.

It is an arithmetic number, because the mean of its divisors is an integer number (372335511).

Almost surely, 2^744671021 is an apocalyptic number.

It is an amenable number.

744671021 is a deficient number, since it is larger than the sum of its proper divisors (1).

744671021 is an equidigital number, since it uses as much as digits as its factorization.

744671021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 744671021 is about 27288.6610334769. The cubic root of 744671021 is about 906.4033135403.

The spelling of 744671021 in words is "seven hundred forty-four million, six hundred seventy-one thousand, twenty-one".