689937 has 4 divisors (see below), whose sum is σ = 919920. Its totient is φ = 459956.

The previous prime is 689929. The next prime is 689951. The reversal of 689937 is 739986.

It is a happy number.

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 not a de Polignac number, because 689937 - 2³ = 689929 is a prime.

It is a D-number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (689917) 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, 114987 + ... + 114992.

It is an arithmetic number, because the mean of its divisors is an integer number (229980).

2⁶⁸⁹⁹³⁷ is an apocalyptic number.

It is an amenable number.

689937 is a deficient number, since it is larger than the sum of its proper divisors (229983).

689937 is a wasteful number, since it uses less digits than its factorization.

689937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229982.

The product of its digits is 81648, while the sum is 42.

The square root of 689937 is about 830.6244638824. The cubic root of 689937 is about 88.3628697556.

The spelling of 689937 in words is "six hundred eighty-nine thousand, nine hundred thirty-seven".