135870139 has 2 divisors, whose sum is σ = 135870140. Its totient is φ = 135870138.

The previous prime is 135870113. The next prime is 135870143. The reversal of 135870139 is 931078531.

It is a happy number.

135870139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (931078531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135870139 - 2¹⁵ = 135837371 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135870098 and 135870107.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67935069 + 67935070.

It is an arithmetic number, because the mean of its divisors is an integer number (67935070).

Almost surely, 2^135870139 is an apocalyptic number.

135870139 is a deficient number, since it is larger than the sum of its proper divisors (1).

135870139 is an equidigital number, since it uses as much as digits as its factorization.

135870139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 135870139 is about 11656.3347155098. The cubic root of 135870139 is about 514.0925850268.

The spelling of 135870139 in words is "one hundred thirty-five million, eight hundred seventy thousand, one hundred thirty-nine".