135445939 has 8 divisors (see below), whose sum is σ = 136347840. Its totient is φ = 134547456.

The previous prime is 135445903. The next prime is 135445951. The reversal of 135445939 is 939544531.

It is a happy number.

135445939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135445939 - 2⁷ = 135445811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135445895 and 135445904.

It is not an unprimeable number, because it can be changed into a prime (135445969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184417 + ... + 185149.

It is an arithmetic number, because the mean of its divisors is an integer number (17043480).

Almost surely, 2^135445939 is an apocalyptic number.

135445939 is a deficient number, since it is larger than the sum of its proper divisors (901901).

135445939 is an equidigital number, since it uses as much as digits as its factorization.

135445939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709.

The product of its digits is 291600, while the sum is 43.

The square root of 135445939 is about 11638.1243763761. The cubic root of 135445939 is about 513.5570113179.

The spelling of 135445939 in words is "one hundred thirty-five million, four hundred forty-five thousand, nine hundred thirty-nine".