Search a number
BaseRepresentation
bin100000000100111110
320200020022
4200010332
513201030
62452142
71055030
oct400476
9220208
10131390
118a796
1264052
1347a5c
1435c50
1528de5
hex2013e

131390 has 16 divisors (see below), whose sum is σ = 270432. Its totient is φ = 45024.

The previous prime is 131381. The next prime is 131413. The reversal of 131390 is 93131.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

131390 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 7 ways as a sum of consecutive naturals, for example, 869 + ... + 1008.

It is an arithmetic number, because the mean of its divisors is an integer number (16902).

2131390 is an apocalyptic number.

131390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131390 is an abundant number, since it is smaller than the sum of its proper divisors (139042).

It is a weird number, because it is abundant, but not a pseudoperfect number.

131390 is a wasteful number, since it uses less digits than its factorization.

131390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 131390 is about 362.4775855139. The cubic root of 131390 is about 50.8378806885.

The spelling of 131390 in words is "one hundred thirty-one thousand, three hundred ninety".