186381361 has 2 divisors, whose sum is σ = 186381362. Its totient is φ = 186381360.

The previous prime is 186381359. The next prime is 186381373. The reversal of 186381361 is 163183681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154853136 + 31528225 = 12444^2 + 5615^2 .

It is an emirp because it is prime and its reverse (163183681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 186381361 - 2¹ = 186381359 is a prime.

Together with 186381359, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 186381361.

It is not a weakly prime, because it can be changed into another prime (186381061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93190680 + 93190681.

It is an arithmetic number, because the mean of its divisors is an integer number (93190681).

Almost surely, 2^186381361 is an apocalyptic number.

It is an amenable number.

186381361 is a deficient number, since it is larger than the sum of its proper divisors (1).

186381361 is an equidigital number, since it uses as much as digits as its factorization.

186381361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 186381361 is about 13652.1559103315. The cubic root of 186381361 is about 571.2166083583.

The spelling of 186381361 in words is "one hundred eighty-six million, three hundred eighty-one thousand, three hundred sixty-one".