186228461 has 2 divisors, whose sum is σ = 186228462. Its totient is φ = 186228460.

The previous prime is 186228391. The next prime is 186228463. The reversal of 186228461 is 164822681.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186186025 + 42436 = 13645^2 + 206^2 .

It is an emirp because it is prime and its reverse (164822681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 186228461 - 2²² = 182034157 is a prime.

Together with 186228463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (186228463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93114230 + 93114231.

It is an arithmetic number, because the mean of its divisors is an integer number (93114231).

Almost surely, 2^186228461 is an apocalyptic number.

It is an amenable number.

186228461 is a deficient number, since it is larger than the sum of its proper divisors (1).

186228461 is an equidigital number, since it uses as much as digits as its factorization.

186228461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36864, while the sum is 38.

The square root of 186228461 is about 13646.5549132373. The cubic root of 186228461 is about 571.0603643487.

The spelling of 186228461 in words is "one hundred eighty-six million, two hundred twenty-eight thousand, four hundred sixty-one".