689629692 has 12 divisors (see below), whose sum is σ = 1609135976. Its totient is φ = 229876560.

The previous prime is 689629679. The next prime is 689629697. The reversal of 689629692 is 296926986.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×689629692² = 951178224176029728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689629697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28734559 + ... + 28734582.

Almost surely, 2^689629692 is an apocalyptic number.

It is an amenable number.

689629692 is an abundant number, since it is smaller than the sum of its proper divisors (919506284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689629692 is a wasteful number, since it uses less digits than its factorization.

689629692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57469148 (or 57469146 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 57.

The square root of 689629692 is about 26260.8014348382. The cubic root of 689629692 is about 883.4974843705.

The spelling of 689629692 in words is "six hundred eighty-nine million, six hundred twenty-nine thousand, six hundred ninety-two".