689899 has 8 divisors (see below), whose sum is σ = 800768. Its totient is φ = 582120.

The previous prime is 689893. The next prime is 689903. The reversal of 689899 is 998986.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 689899 - 2³ = 689891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689891) 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 in 7 ways as a sum of consecutive naturals, for example, 267 + ... + 1204.

It is an arithmetic number, because the mean of its divisors is an integer number (100096).

2⁶⁸⁹⁸⁹⁹ is an apocalyptic number.

689899 is a deficient number, since it is larger than the sum of its proper divisors (110869).

689899 is a wasteful number, since it uses less digits than its factorization.

689899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545.

The product of its digits is 279936, while the sum is 49.

The square root of 689899 is about 830.6015892111. The cubic root of 689899 is about 88.3612474574.

The spelling of 689899 in words is "six hundred eighty-nine thousand, eight hundred ninety-nine".