135066639 has 4 divisors (see below), whose sum is σ = 180088856. Its totient is φ = 90044424.

The previous prime is 135066623. The next prime is 135066661. The reversal of 135066639 is 936660531.

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

It is not a de Polignac number, because 135066639 - 2⁴ = 135066623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135066597 and 135066606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135066619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22511104 + ... + 22511109.

It is an arithmetic number, because the mean of its divisors is an integer number (45022214).

Almost surely, 2^135066639 is an apocalyptic number.

135066639 is a deficient number, since it is larger than the sum of its proper divisors (45022217).

135066639 is an equidigital number, since it uses as much as digits as its factorization.

135066639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45022216.

The product of its (nonzero) digits is 87480, while the sum is 39.

The square root of 135066639 is about 11621.8173707902. The cubic root of 135066639 is about 513.0771783309.

The spelling of 135066639 in words is "one hundred thirty-five million, sixty-six thousand, six hundred thirty-nine".