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195636169 = 7121972
BaseRepresentation
bin10111010100100…
…10101111001001
3111122010100101001
423222102233021
5400040324134
631225055001
74563610561
oct1352225711
9448110331
10195636169
11a0482393
1255627461
13316b9c61
141bda7da1
1512296414
hexba92bc9

195636169 has 9 divisors (see below), whose sum is σ = 199442791. Its totient is φ = 191901640.

The previous prime is 195636167. The next prime is 195636173. The reversal of 195636169 is 961636591.

The square root of 195636169 is 13987.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 191684025 + 3952144 = 13845^2 + 1988^2 .

It is not a de Polignac number, because 195636169 - 21 = 195636167 is a prime.

It is a super-2 number, since 2×1956361692 = 76547021241993122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195636167) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 992979 + ... + 993175.

Almost surely, 2195636169 is an apocalyptic number.

195636169 is the 13987-th square number.

195636169 is the 6994-th centered octagonal number.

It is an amenable number.

195636169 is a deficient number, since it is larger than the sum of its proper divisors (3806622).

195636169 is an frugal number, since it uses more digits than its factorization.

195636169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536 (or 268 counting only the distinct ones).

The product of its digits is 262440, while the sum is 46.

The cubic root of 195636169 is about 580.5189261845.

The spelling of 195636169 in words is "one hundred ninety-five million, six hundred thirty-six thousand, one hundred sixty-nine".

Divisors: 1 71 197 5041 13987 38809 993077 2755439 195636169