689873 has 2 divisors, whose sum is σ = 689874. Its totient is φ = 689872.

The previous prime is 689869. The next prime is 689879. The reversal of 689873 is 378986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 677329 + 12544 = 823^2 + 112^2 .

It is a cyclic number.

It is not a de Polignac number, because 689873 - 2² = 689869 is a prime.

It is a super-2 number, since 2×689873² = 951849512258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 689873.

It is not a weakly prime, because it can be changed into another prime (689879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344936 + 344937.

It is an arithmetic number, because the mean of its divisors is an integer number (344937).

2⁶⁸⁹⁸⁷³ is an apocalyptic number.

It is an amenable number.

689873 is a deficient number, since it is larger than the sum of its proper divisors (1).

689873 is an equidigital number, since it uses as much as digits as its factorization.

689873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 689873 is about 830.5859377572. The cubic root of 689873 is about 88.3601374295.

The spelling of 689873 in words is "six hundred eighty-nine thousand, eight hundred seventy-three".