689137 has 4 divisors (see below), whose sum is σ = 692800. Its totient is φ = 685476.

The previous prime is 689131. The next prime is 689141. The reversal of 689137 is 731986.

689137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689137 is a prime.

It is a Duffinian number.

689137 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (689131) 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, 1533 + ... + 1930.

It is an arithmetic number, because the mean of its divisors is an integer number (173200).

2⁶⁸⁹¹³⁷ is an apocalyptic number.

It is an amenable number.

689137 is a deficient number, since it is larger than the sum of its proper divisors (3663).

689137 is a wasteful number, since it uses less digits than its factorization.

689137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3662.

The product of its digits is 9072, while the sum is 34.

The square root of 689137 is about 830.1427588072. The cubic root of 689137 is about 88.3287035270.

Subtracting 689137 from its reverse (731986), we obtain a square (42849 = 207²).

The spelling of 689137 in words is "six hundred eighty-nine thousand, one hundred thirty-seven".