689161806 has 48 divisors (see below), whose sum is σ = 1622499840. Its totient is φ = 210606480.

The previous prime is 689161777. The next prime is 689161819. The reversal of 689161806 is 608161986.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21900 + ... + 43103.

It is an arithmetic number, because the mean of its divisors is an integer number (33802080).

Almost surely, 2^689161806 is an apocalyptic number.

689161806 is an abundant number, since it is smaller than the sum of its proper divisors (933338034).

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

689161806 is a wasteful number, since it uses less digits than its factorization.

689161806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65061 (or 65058 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 689161806 is about 26251.8914747109. The cubic root of 689161806 is about 883.2976333343.

The spelling of 689161806 in words is "six hundred eighty-nine million, one hundred sixty-one thousand, eight hundred six".