689963 has 2 divisors, whose sum is σ = 689964. Its totient is φ = 689962.

The previous prime is 689959. The next prime is 689981. The reversal of 689963 is 369986.

689963 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 is a cyclic number.

It is not a de Polignac number, because 689963 - 2² = 689959 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 689963.

It is not a weakly prime, because it can be changed into another prime (689903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344981 + 344982.

It is an arithmetic number, because the mean of its divisors is an integer number (344982).

2⁶⁸⁹⁹⁶³ is an apocalyptic number.

689963 is a deficient number, since it is larger than the sum of its proper divisors (1).

689963 is an equidigital number, since it uses as much as digits as its factorization.

689963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 41.

The square root of 689963 is about 830.6401146104. The cubic root of 689963 is about 88.3639797148.

The spelling of 689963 in words is "six hundred eighty-nine thousand, nine hundred sixty-three".