135187139 has 2 divisors, whose sum is σ = 135187140. Its totient is φ = 135187138.

The previous prime is 135187081. The next prime is 135187193. The reversal of 135187139 is 931781531.

Together with next prime (135187193) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135187139 - 2¹⁶ = 135121603 is a prime.

It is not a weakly prime, because it can be changed into another prime (135187439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67593569 + 67593570.

It is an arithmetic number, because the mean of its divisors is an integer number (67593570).

Almost surely, 2^135187139 is an apocalyptic number.

135187139 is a deficient number, since it is larger than the sum of its proper divisors (1).

135187139 is an equidigital number, since it uses as much as digits as its factorization.

135187139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 38.

The square root of 135187139 is about 11627.0004300335. Note that the first 3 decimals coincide. The cubic root of 135187139 is about 513.2297139571.

The spelling of 135187139 in words is "one hundred thirty-five million, one hundred eighty-seven thousand, one hundred thirty-nine".