722729 has 12 divisors (see below), whose sum is σ = 874944. Its totient is φ = 583704.

The previous prime is 722723. The next prime is 722737. The reversal of 722729 is 927227.

It is not a de Polignac number, because 722729 - 2⁴ = 722713 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10754 + ... + 10820.

It is an arithmetic number, because the mean of its divisors is an integer number (72912).

2⁷²²⁷²⁹ is an apocalyptic number.

It is an amenable number.

722729 is a deficient number, since it is larger than the sum of its proper divisors (152215).

722729 is an equidigital number, since it uses as much as digits as its factorization.

722729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164 (or 97 counting only the distinct ones).

The product of its digits is 3528, while the sum is 29.

The square root of 722729 is about 850.1346952101. The cubic root of 722729 is about 89.7411906221.

The spelling of 722729 in words is "seven hundred twenty-two thousand, seven hundred twenty-nine".