721436573 has 8 divisors (see below), whose sum is σ = 847562016. Its totient is φ = 605401200.

The previous prime is 721436563. The next prime is 721436603. The reversal of 721436573 is 375634127.

721436573 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 721436573 - 2¹² = 721432477 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 (721436563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2522363 + ... + 2522648.

It is an arithmetic number, because the mean of its divisors is an integer number (105945252).

Almost surely, 2^721436573 is an apocalyptic number.

It is an amenable number.

721436573 is a deficient number, since it is larger than the sum of its proper divisors (126125443).

721436573 is a wasteful number, since it uses less digits than its factorization.

721436573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5045035.

The product of its digits is 105840, while the sum is 38.

The square root of 721436573 is about 26859.5713480316. The cubic root of 721436573 is about 896.8766519137.

The spelling of 721436573 in words is "seven hundred twenty-one million, four hundred thirty-six thousand, five hundred seventy-three".