689842159 has 4 divisors (see below), whose sum is σ = 691038304. Its totient is φ = 688646016.

The previous prime is 689842147. The next prime is 689842187. The reversal of 689842159 is 951248986.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 689842159 - 2¹¹ = 689840111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689842199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597207 + ... + 598360.

It is an arithmetic number, because the mean of its divisors is an integer number (172759576).

Almost surely, 2^689842159 is an apocalyptic number.

689842159 is a deficient number, since it is larger than the sum of its proper divisors (1196145).

689842159 is a wasteful number, since it uses less digits than its factorization.

689842159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196144.

The product of its digits is 1244160, while the sum is 52.

The square root of 689842159 is about 26264.8464491990. The cubic root of 689842159 is about 883.5882068688.

The spelling of 689842159 in words is "six hundred eighty-nine million, eight hundred forty-two thousand, one hundred fifty-nine".