721675543 has 4 divisors (see below), whose sum is σ = 723952440. Its totient is φ = 719398648.

The previous prime is 721675541. The next prime is 721675561. The reversal of 721675543 is 345576127.

721675543 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.

It is a cyclic number.

It is not a de Polignac number, because 721675543 - 2¹ = 721675541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 721675496 and 721675505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721675541) 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, 1137973 + ... + 1138606.

It is an arithmetic number, because the mean of its divisors is an integer number (180988110).

Almost surely, 2^721675543 is an apocalyptic number.

721675543 is a deficient number, since it is larger than the sum of its proper divisors (2276897).

721675543 is a wasteful number, since it uses less digits than its factorization.

721675543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276896.

The product of its digits is 176400, while the sum is 40.

The square root of 721675543 is about 26864.0194870388. The cubic root of 721675543 is about 896.9756686817.

The spelling of 721675543 in words is "seven hundred twenty-one million, six hundred seventy-five thousand, five hundred forty-three".