186472681 has 2 divisors, whose sum is σ = 186472682. Its totient is φ = 186472680.

The previous prime is 186472679. The next prime is 186472687. The reversal of 186472681 is 186274681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184824025 + 1648656 = 13595^2 + 1284^2 .

It is an emirp because it is prime and its reverse (186274681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 186472681 - 2¹ = 186472679 is a prime.

It is a super-2 number, since 2×186472681² = 69544121518655522, which contains 22 as substring.

Together with 186472679, it forms a pair of twin primes.

It is the 13656-th Hogben number.

It is not a weakly prime, because it can be changed into another prime (186472687) by changing a digit.

It is a nontrivial repunit in base 13655.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93236340 + 93236341.

It is an arithmetic number, because the mean of its divisors is an integer number (93236341).

Almost surely, 2^186472681 is an apocalyptic number.

It is an amenable number.

186472681 is a deficient number, since it is larger than the sum of its proper divisors (1).

186472681 is an equidigital number, since it uses as much as digits as its factorization.

186472681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 43.

The square root of 186472681 is about 13655.5000274615. The cubic root of 186472681 is about 571.3098848235.

The spelling of 186472681 in words is "one hundred eighty-six million, four hundred seventy-two thousand, six hundred eighty-one".