743726921 has 32 divisors (see below), whose sum is σ = 905748480. Its totient is φ = 597225600.

The previous prime is 743726891. The next prime is 743726923. The reversal of 743726921 is 129627347.

743726921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 743726921 - 2¹⁰ = 743725897 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (743726923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1592330 + ... + 1592796.

It is an arithmetic number, because the mean of its divisors is an integer number (28304640).

Almost surely, 2^743726921 is an apocalyptic number.

It is an amenable number.

743726921 is a deficient number, since it is larger than the sum of its proper divisors (162021559).

743726921 is a wasteful number, since it uses less digits than its factorization.

743726921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725.

The product of its digits is 127008, while the sum is 41.

The square root of 743726921 is about 27271.3571536145. The cubic root of 743726921 is about 906.0201030419.

The spelling of 743726921 in words is "seven hundred forty-three million, seven hundred twenty-six thousand, nine hundred twenty-one".