135908028913 has 4 divisors (see below), whose sum is σ = 135908941168. Its totient is φ = 135907116660.

The previous prime is 135908028889. The next prime is 135908028931. The reversal of 135908028913 is 319820809531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 319820809531 = 37 ⋅8643805663.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135908028913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135908028973) 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, 174831 + ... + 549892.

It is an arithmetic number, because the mean of its divisors is an integer number (33977235292).

Almost surely, 2^135908028913 is an apocalyptic number.

It is an amenable number.

135908028913 is a deficient number, since it is larger than the sum of its proper divisors (912255).

135908028913 is an equidigital number, since it uses as much as digits as its factorization.

135908028913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912254.

The product of its (nonzero) digits is 466560, while the sum is 49.

The spelling of 135908028913 in words is "one hundred thirty-five billion, nine hundred eight million, twenty-eight thousand, nine hundred thirteen".