722687 has 8 divisors (see below), whose sum is σ = 874656. Its totient is φ = 582912.

The previous prime is 722669. The next prime is 722713. The reversal of 722687 is 786227.

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 722687 - 2⁸ = 722431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 722687.

It is not an unprimeable number, because it can be changed into a prime (722287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2918 + ... + 3155.

It is an arithmetic number, because the mean of its divisors is an integer number (109332).

2⁷²²⁶⁸⁷ is an apocalyptic number.

722687 is a deficient number, since it is larger than the sum of its proper divisors (151969).

722687 is a wasteful number, since it uses less digits than its factorization.

722687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6097.

The product of its digits is 9408, while the sum is 32.

The square root of 722687 is about 850.1099928833. The cubic root of 722687 is about 89.7394522097.

The spelling of 722687 in words is "seven hundred twenty-two thousand, six hundred eighty-seven".