722447 has 4 divisors (see below), whose sum is σ = 788136. Its totient is φ = 656760.

The previous prime is 722431. The next prime is 722459. The reversal of 722447 is 744227.

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 722447 - 2⁴ = 722431 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (722417) 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, 32828 + ... + 32849.

It is an arithmetic number, because the mean of its divisors is an integer number (197034).

2⁷²²⁴⁴⁷ is an apocalyptic number.

722447 is a deficient number, since it is larger than the sum of its proper divisors (65689).

722447 is a wasteful number, since it uses less digits than its factorization.

722447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65688.

The product of its digits is 3136, while the sum is 26.

The square root of 722447 is about 849.9688229576. The cubic root of 722447 is about 89.7295171327.

The spelling of 722447 in words is "seven hundred twenty-two thousand, four hundred forty-seven", and thus it is an iban number.