184135561 has 2 divisors, whose sum is σ = 184135562. Its totient is φ = 184135560.

The previous prime is 184135559. The next prime is 184135579. The reversal of 184135561 is 165531481.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175403536 + 8732025 = 13244^2 + 2955^2 .

It is an emirp because it is prime and its reverse (165531481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 184135561 - 2¹ = 184135559 is a prime.

Together with 184135559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (184135531) 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, 92067780 + 92067781.

It is an arithmetic number, because the mean of its divisors is an integer number (92067781).

Almost surely, 2^184135561 is an apocalyptic number.

It is an amenable number.

184135561 is a deficient number, since it is larger than the sum of its proper divisors (1).

184135561 is an equidigital number, since it uses as much as digits as its factorization.

184135561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 34.

The square root of 184135561 is about 13569.6558909944. The cubic root of 184135561 is about 568.9130419176.

The spelling of 184135561 in words is "one hundred eighty-four million, one hundred thirty-five thousand, five hundred sixty-one".