131689206 has 128 divisors (see below), whose sum is σ = 335923200. Its totient is φ = 37889280.

The previous prime is 131689193. The next prime is 131689223. The reversal of 131689206 is 602986131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1479610 + ... + 1479698.

It is an arithmetic number, because the mean of its divisors is an integer number (2624400).

Almost surely, 2^131689206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131689206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167961600).

131689206 is an abundant number, since it is smaller than the sum of its proper divisors (204233994).

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

131689206 is a wasteful number, since it uses less digits than its factorization.

131689206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 205 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 131689206 is about 11475.5917494480. The cubic root of 131689206 is about 508.7644137847.

The spelling of 131689206 in words is "one hundred thirty-one million, six hundred eighty-nine thousand, two hundred six".