[go: up one dir, main page]

Search a number
-
+
136731321 = 341688041
BaseRepresentation
bin10000010011001…
…01101010111001
3100112021200010000
420021211222321
5240000400241
621322343213
73250124406
oct1011455271
9315250100
10136731321
11701aa2a1
123995ab09
132243460c
14142332ad
15c00ceb6
hex8265ab9

136731321 has 10 divisors (see below), whose sum is σ = 204253082. Its totient is φ = 91154160.

The previous prime is 136731313. The next prime is 136731337. The reversal of 136731321 is 123137631.

It can be written as a sum of positive squares in only one way, i.e., 98724096 + 38007225 = 9936^2 + 6165^2 .

It is not a de Polignac number, because 136731321 - 23 = 136731313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (136731311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 843940 + ... + 844101.

Almost surely, 2136731321 is an apocalyptic number.

It is an amenable number.

136731321 is a deficient number, since it is larger than the sum of its proper divisors (67521761).

136731321 is an equidigital number, since it uses as much as digits as its factorization.

136731321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688053 (or 1688044 counting only the distinct ones).

The product of its digits is 2268, while the sum is 27.

The square root of 136731321 is about 11693.2168798838. The cubic root of 136731321 is about 515.1764513034.

Adding to 136731321 its reverse (123137631), we get a palindrome (259868952).

The spelling of 136731321 in words is "one hundred thirty-six million, seven hundred thirty-one thousand, three hundred twenty-one".

Divisors: 1 3 9 27 81 1688041 5064123 15192369 45577107 136731321