747914221 has 4 divisors (see below), whose sum is σ = 749401632. Its totient is φ = 746426812.

The previous prime is 747914177. The next prime is 747914231. The reversal of 747914221 is 122419747.

747914221 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.

It is a cyclic number.

It is not a de Polignac number, because 747914221 - 2⁹ = 747913709 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 (747914231) 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, 742951 + ... + 743956.

It is an arithmetic number, because the mean of its divisors is an integer number (187350408).

Almost surely, 2^747914221 is an apocalyptic number.

It is an amenable number.

747914221 is a deficient number, since it is larger than the sum of its proper divisors (1487411).

747914221 is a wasteful number, since it uses less digits than its factorization.

747914221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487410.

The product of its digits is 28224, while the sum is 37.

The square root of 747914221 is about 27348.0204219611. The cubic root of 747914221 is about 907.7172673285.

The spelling of 747914221 in words is "seven hundred forty-seven million, nine hundred fourteen thousand, two hundred twenty-one".