135189186689 has 2 divisors, whose sum is σ = 135189186690. Its totient is φ = 135189186688.

The previous prime is 135189186667. The next prime is 135189186719. The reversal of 135189186689 is 986681981531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82134974464 + 53054212225 = 286592^2 + 230335^2 .

It is an emirp because it is prime and its reverse (986681981531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135189186689 - 2¹² = 135189182593 is a prime.

It is a super-2 number, since 2×135189186689² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135189186659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67594593344 + 67594593345.

It is an arithmetic number, because the mean of its divisors is an integer number (67594593345).

Almost surely, 2^135189186689 is an apocalyptic number.

It is an amenable number.

135189186689 is a deficient number, since it is larger than the sum of its proper divisors (1).

135189186689 is an equidigital number, since it uses as much as digits as its factorization.

135189186689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22394880, while the sum is 65.

The spelling of 135189186689 in words is "one hundred thirty-five billion, one hundred eighty-nine million, one hundred eighty-six thousand, six hundred eighty-nine".