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722669 is a prime number
BaseRepresentation
bin10110000011011101101
31100201022112
42300123231
5141111134
623253405
76066623
oct2603355
91321275
10722669
11453a52
122aa265
131c3c1c
1414b513
15e41ce
hexb06ed

722669 has 2 divisors, whose sum is σ = 722670. Its totient is φ = 722668.

The previous prime is 722663. The next prime is 722713. The reversal of 722669 is 966227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 169 = 850^2 + 13^2 .

It is an emirp because it is prime and its reverse (966227) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-722669 is a prime.

It is a super-2 number, since 2×7226692 = 1044500967122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (722663) 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 as a sum of consecutive naturals, namely, 361334 + 361335.

It is an arithmetic number, because the mean of its divisors is an integer number (361335).

2722669 is an apocalyptic number.

It is an amenable number.

722669 is a deficient number, since it is larger than the sum of its proper divisors (1).

722669 is an equidigital number, since it uses as much as digits as its factorization.

722669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 32.

The square root of 722669 is about 850.0994059520. The cubic root of 722669 is about 89.7387071553.

The spelling of 722669 in words is "seven hundred twenty-two thousand, six hundred sixty-nine".