186734038489 has 2 divisors, whose sum is σ = 186734038490. Its totient is φ = 186734038488.

The previous prime is 186734038483. The next prime is 186734038507. The reversal of 186734038489 is 984830437681.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131104098889 + 55629939600 = 362083^2 + 235860^2 .

It is an emirp because it is prime and its reverse (984830437681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 186734038489 - 2³ = 186734038481 is a prime.

It is a super-2 number, since 2×186734038489² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (186734038481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 93367019244 + 93367019245.

It is an arithmetic number, because the mean of its divisors is an integer number (93367019245).

Almost surely, 2^186734038489 is an apocalyptic number.

It is an amenable number.

186734038489 is a deficient number, since it is larger than the sum of its proper divisors (1).

186734038489 is an equidigital number, since it uses as much as digits as its factorization.

186734038489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 186734038489 in words is "one hundred eighty-six billion, seven hundred thirty-four million, thirty-eight thousand, four hundred eighty-nine".