746724221 has 4 divisors (see below), whose sum is σ = 748876512. Its totient is φ = 744571932.

The previous prime is 746724211. The next prime is 746724289. The reversal of 746724221 is 122427647.

746724221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122427647 = 29 ⋅4221643.

It is a cyclic number.

It is not a de Polignac number, because 746724221 - 2⁶ = 746724157 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 (746724211) 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, 1075625 + ... + 1076318.

It is an arithmetic number, because the mean of its divisors is an integer number (187219128).

Almost surely, 2^746724221 is an apocalyptic number.

It is an amenable number.

746724221 is a deficient number, since it is larger than the sum of its proper divisors (2152291).

746724221 is a wasteful number, since it uses less digits than its factorization.

746724221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152290.

The product of its digits is 37632, while the sum is 35.

The square root of 746724221 is about 27326.2551587297. The cubic root of 746724221 is about 907.2355913488.

The spelling of 746724221 in words is "seven hundred forty-six million, seven hundred twenty-four thousand, two hundred twenty-one".