Search a number
-
+
131689836 = 223219192529
BaseRepresentation
bin1111101100101…
…10110101101100
3100011210112111100
413312112311230
5232203033321
621022323100
73156226245
oct766266554
9304715440
10131689836
1168376583
1238129490
132138a9a5
14136bdccc
15b864326
hex7d96d6c

131689836 has 36 divisors (see below), whose sum is σ = 350404600. Its totient is φ = 41586048.

The previous prime is 131689823. The next prime is 131689847. The reversal of 131689836 is 638986131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 131689791 and 131689800.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 95581 + ... + 96948.

Almost surely, 2131689836 is an apocalyptic number.

It is an amenable number.

131689836 is an abundant number, since it is smaller than the sum of its proper divisors (218714764).

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

131689836 is a wasteful number, since it uses less digits than its factorization.

131689836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192558 (or 192553 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 131689836 is about 11475.6191989801. The cubic root of 131689836 is about 508.7652250916.

The spelling of 131689836 in words is "one hundred thirty-one million, six hundred eighty-nine thousand, eight hundred thirty-six".

Divisors: 1 2 3 4 6 9 12 18 19 36 38 57 76 114 171 228 342 684 192529 385058 577587 770116 1155174 1732761 2310348 3465522 3658051 6931044 7316102 10974153 14632204 21948306 32922459 43896612 65844918 131689836