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131792681 = 1315211931
BaseRepresentation
bin1111101101011…
…11111100101001
3100011222202120102
413312233330221
5232214331211
621024435145
73160135136
oct766577451
9304882512
10131792681
1168436879
1238178ab5
13213c5747
141370958d
15b884a3b
hex7daff29

131792681 has 8 divisors (see below), whose sum is σ = 133122528. Its totient is φ = 130468000.

The previous prime is 131792677. The next prime is 131792693. The reversal of 131792681 is 186297131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131792681 - 22 = 131792677 is a prime.

It is a super-2 number, since 2×1317926812 = 34738621530335522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131792621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67286 + ... + 69216.

It is an arithmetic number, because the mean of its divisors is an integer number (16640316).

Almost surely, 2131792681 is an apocalyptic number.

It is an amenable number.

131792681 is a deficient number, since it is larger than the sum of its proper divisors (1329847).

131792681 is a wasteful number, since it uses less digits than its factorization.

131792681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583.

The product of its digits is 18144, while the sum is 38.

The square root of 131792681 is about 11480.0993462600. The cubic root of 131792681 is about 508.8976330435.

The spelling of 131792681 in words is "one hundred thirty-one million, seven hundred ninety-two thousand, six hundred eighty-one".

Divisors: 1 131 521 1931 68251 252961 1006051 131792681