135127639 has 4 divisors (see below), whose sum is σ = 142239640. Its totient is φ = 128015640.

The previous prime is 135127631. The next prime is 135127661. The reversal of 135127639 is 936721531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135127639 - 2³ = 135127631 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135127598 and 135127607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135127631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3555972 + ... + 3556009.

It is an arithmetic number, because the mean of its divisors is an integer number (35559910).

Almost surely, 2^135127639 is an apocalyptic number.

135127639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

135127639 is a deficient number, since it is larger than the sum of its proper divisors (7112001).

135127639 is an equidigital number, since it uses as much as digits as its factorization.

135127639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7112000.

The product of its digits is 34020, while the sum is 37.

The square root of 135127639 is about 11624.4414489471. The cubic root of 135127639 is about 513.1544068695.

The spelling of 135127639 in words is "one hundred thirty-five million, one hundred twenty-seven thousand, six hundred thirty-nine".