689692 has 6 divisors (see below), whose sum is σ = 1206968. Its totient is φ = 344844.

The previous prime is 689641. The next prime is 689693. The reversal of 689692 is 296986.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689693) by changing a digit.

689692 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86208 + ... + 86215.

2⁶⁸⁹⁶⁹² is an apocalyptic number.

It is an amenable number.

689692 is a deficient number, since it is larger than the sum of its proper divisors (517276).

689692 is a wasteful number, since it uses less digits than its factorization.

689692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172427 (or 172425 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The square root of 689692 is about 830.4769713845. The cubic root of 689692 is about 88.3524091550.

It can be divided in two parts, 6 and 89692, that added together give a palindrome (89698).

The spelling of 689692 in words is "six hundred eighty-nine thousand, six hundred ninety-two".