689774 has 4 divisors (see below), whose sum is σ = 1034664. Its totient is φ = 344886.

The previous prime is 689771. The next prime is 689779. The reversal of 689774 is 477986.

689774 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.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172442 + ... + 172445.

It is an arithmetic number, because the mean of its divisors is an integer number (258666).

2⁶⁸⁹⁷⁷⁴ is an apocalyptic number.

689774 is a deficient number, since it is larger than the sum of its proper divisors (344890).

689774 is a wasteful number, since it uses less digits than its factorization.

689774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344889.

The product of its digits is 84672, while the sum is 41.

The square root of 689774 is about 830.5263391368. The cubic root of 689774 is about 88.3559105298.

The spelling of 689774 in words is "six hundred eighty-nine thousand, seven hundred seventy-four".