672817 has 2 divisors, whose sum is σ = 672818. Its totient is φ = 672816.

The previous prime is 672811. The next prime is 672823. The reversal of 672817 is 718276.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (672811) and next prime (672823).

It can be written as a sum of positive squares in only one way, i.e., 531441 + 141376 = 729^2 + 376^2 .

It is a cyclic number.

It is not a de Polignac number, because 672817 - 2¹⁵ = 640049 is a prime.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (672811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336408 + 336409.

It is an arithmetic number, because the mean of its divisors is an integer number (336409).

2⁶⁷²⁸¹⁷ is an apocalyptic number.

It is an amenable number.

672817 is a deficient number, since it is larger than the sum of its proper divisors (1).

672817 is an equidigital number, since it uses as much as digits as its factorization.

672817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 31.

The square root of 672817 is about 820.2542288827. The cubic root of 672817 is about 87.6258651199.

The spelling of 672817 in words is "six hundred seventy-two thousand, eight hundred seventeen".