689594 has 4 divisors (see below), whose sum is σ = 1034394. Its totient is φ = 344796.

The previous prime is 689587. The next prime is 689597. The reversal of 689594 is 495986.

689594 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 an emirpimes, since its reverse is a distinct semiprime: 495986 = 2 ⋅247993.

It can be written as a sum of positive squares in only one way, i.e., 619369 + 70225 = 787^2 + 265^2 .

It is not an unprimeable number, because it can be changed into a prime (689597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172397 + ... + 172400.

2⁶⁸⁹⁵⁹⁴ is an apocalyptic number.

689594 is a deficient number, since it is larger than the sum of its proper divisors (344800).

689594 is a wasteful number, since it uses less digits than its factorization.

689594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344799.

The product of its digits is 77760, while the sum is 41.

The square root of 689594 is about 830.4179670503. The cubic root of 689594 is about 88.3482242211.

The spelling of 689594 in words is "six hundred eighty-nine thousand, five hundred ninety-four".