689893 has 2 divisors, whose sum is σ = 689894. Its totient is φ = 689892.

The previous prime is 689891. The next prime is 689903. The reversal of 689893 is 398986.

689893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 412164 + 277729 = 642^2 + 527^2 .

It is a cyclic number.

It is not a de Polignac number, because 689893 - 2¹ = 689891 is a prime.

Together with 689891, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344946 + 344947.

It is an arithmetic number, because the mean of its divisors is an integer number (344947).

2⁶⁸⁹⁸⁹³ is an apocalyptic number.

It is an amenable number.

689893 is a deficient number, since it is larger than the sum of its proper divisors (1).

689893 is an equidigital number, since it uses as much as digits as its factorization.

689893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 43.

The square root of 689893 is about 830.5979773633. The cubic root of 689893 is about 88.3609912996.

The spelling of 689893 in words is "six hundred eighty-nine thousand, eight hundred ninety-three".