186481 has 2 divisors, whose sum is σ = 186482. Its totient is φ = 186480.

The previous prime is 186479. The next prime is 186551. The reversal of 186481 is 184681.

186481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128881 + 57600 = 359^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 186481 - 2¹ = 186479 is a prime.

It is a super-2 number, since 2×186481² = 69550326722, which contains 22 as substring.

Together with 186479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (186451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93240 + 93241.

It is an arithmetic number, because the mean of its divisors is an integer number (93241).

2¹⁸⁶⁴⁸¹ is an apocalyptic number.

It is an amenable number.

186481 is a deficient number, since it is larger than the sum of its proper divisors (1).

186481 is an equidigital number, since it uses as much as digits as its factorization.

186481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1536, while the sum is 28.

The square root of 186481 is about 431.8344590234. The cubic root of 186481 is about 57.1318380539.

The spelling of 186481 in words is "one hundred eighty-six thousand, four hundred eighty-one".