722677 has 4 divisors (see below), whose sum is σ = 724780. Its totient is φ = 720576.

The previous prime is 722669. The next prime is 722713. The reversal of 722677 is 776227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 776227 = 23 ⋅33749.

It can be written as a sum of positive squares in 2 ways, for example, as 217156 + 505521 = 466^2 + 711^2 .

It is a cyclic number.

It is not a de Polignac number, because 722677 - 2³ = 722669 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 (722077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402 + ... + 1267.

It is an arithmetic number, because the mean of its divisors is an integer number (181195).

2⁷²²⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

722677 is a deficient number, since it is larger than the sum of its proper divisors (2103).

722677 is a wasteful number, since it uses less digits than its factorization.

722677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102.

The product of its digits is 8232, while the sum is 31.

The square root of 722677 is about 850.1041112711. The cubic root of 722677 is about 89.7390382921.

The spelling of 722677 in words is "seven hundred twenty-two thousand, six hundred seventy-seven".