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131982 = 2321997
BaseRepresentation
bin100000001110001110
320201001020
4200032032
513210412
62455010
71056534
oct401616
9221036
10131982
1190184
1264466
13480c6
1436154
152918c
hex2038e

131982 has 8 divisors (see below), whose sum is σ = 263976. Its totient is φ = 43992.

The previous prime is 131969. The next prime is 132001. The reversal of 131982 is 289131.

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

131982 is an admirable number.

It is a congruent number.

It is an unprimeable number.

131982 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10993 + ... + 11004.

It is an arithmetic number, because the mean of its divisors is an integer number (32997).

2131982 is an apocalyptic number.

131982 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

131982 is a wasteful number, since it uses less digits than its factorization.

131982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22002.

The product of its digits is 432, while the sum is 24.

The square root of 131982 is about 363.2932699624. The cubic root of 131982 is about 50.9141192080.

The spelling of 131982 in words is "one hundred thirty-one thousand, nine hundred eighty-two".

Divisors: 1 2 3 6 21997 43994 65991 131982