722617 has 4 divisors (see below), whose sum is σ = 825856. Its totient is φ = 619380.

The previous prime is 722611. The next prime is 722633. The reversal of 722617 is 716227.

722617 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, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 716227 = 17 ⋅42131.

It is a cyclic number.

It is not a de Polignac number, because 722617 - 2⁷ = 722489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 722591 and 722600.

It is not an unprimeable number, because it can be changed into a prime (722611) 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, 51609 + ... + 51622.

It is an arithmetic number, because the mean of its divisors is an integer number (206464).

2⁷²²⁶¹⁷ is an apocalyptic number.

It is an amenable number.

722617 is a deficient number, since it is larger than the sum of its proper divisors (103239).

722617 is a wasteful number, since it uses less digits than its factorization.

722617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103238.

The product of its digits is 1176, while the sum is 25.

The square root of 722617 is about 850.0688207434. The cubic root of 722617 is about 89.7365547062.

The spelling of 722617 in words is "seven hundred twenty-two thousand, six hundred seventeen".