744721407 has 6 divisors (see below), whose sum is σ = 1075708712. Its totient is φ = 496480932.

The previous prime is 744721381. The next prime is 744721427. The reversal of 744721407 is 704127447.

It is not a de Polignac number, because 744721407 - 2¹⁵ = 744688639 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 (744721427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41373403 + ... + 41373420.

Almost surely, 2^744721407 is an apocalyptic number.

744721407 is a deficient number, since it is larger than the sum of its proper divisors (330987305).

744721407 is a wasteful number, since it uses less digits than its factorization.

744721407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82746829 (or 82746826 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 36.

The square root of 744721407 is about 27289.5842218235. The cubic root of 744721407 is about 906.4237561278.

The spelling of 744721407 in words is "seven hundred forty-four million, seven hundred twenty-one thousand, four hundred seven".