744029621 has 4 divisors (see below), whose sum is σ = 744511500. Its totient is φ = 743547744.

The previous prime is 744029617. The next prime is 744029647. The reversal of 744029621 is 126920447.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 345588100 + 398441521 = 18590^2 + 19961^2 .

It is a cyclic number.

It is not a de Polignac number, because 744029621 - 2² = 744029617 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744022621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238616 + ... + 241713.

It is an arithmetic number, because the mean of its divisors is an integer number (186127875).

Almost surely, 2^744029621 is an apocalyptic number.

It is an amenable number.

744029621 is a deficient number, since it is larger than the sum of its proper divisors (481879).

744029621 is a wasteful number, since it uses less digits than its factorization.

744029621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481878.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 744029621 is about 27276.9063678416. The cubic root of 744029621 is about 906.1430043733.

The spelling of 744029621 in words is "seven hundred forty-four million, twenty-nine thousand, six hundred twenty-one".