689135181 has 16 divisors (see below), whose sum is σ = 1051171968. Its totient is φ = 393393600.

The previous prime is 689135179. The next prime is 689135189. The reversal of 689135181 is 181531986.

689135181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 689135181 - 2¹ = 689135179 is a prime.

It is a super-2 number, since 2×689135181² = 949814595383805522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689135189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5371 + ... + 37511.

It is an arithmetic number, because the mean of its divisors is an integer number (65698248).

Almost surely, 2^689135181 is an apocalyptic number.

It is an amenable number.

689135181 is a deficient number, since it is larger than the sum of its proper divisors (362036787).

689135181 is a wasteful number, since it uses less digits than its factorization.

689135181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33172.

The product of its digits is 51840, while the sum is 42.

The square root of 689135181 is about 26251.3843634960. The cubic root of 689135181 is about 883.2862581139.

The spelling of 689135181 in words is "six hundred eighty-nine million, one hundred thirty-five thousand, one hundred eighty-one".