135213838 has 4 divisors (see below), whose sum is σ = 202820760. Its totient is φ = 67606918.

The previous prime is 135213821. The next prime is 135213893. The reversal of 135213838 is 838312531.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33803458 + ... + 33803461.

It is an arithmetic number, because the mean of its divisors is an integer number (50705190).

Almost surely, 2^135213838 is an apocalyptic number.

135213838 is a deficient number, since it is larger than the sum of its proper divisors (67606922).

135213838 is an equidigital number, since it uses as much as digits as its factorization.

135213838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67606921.

The product of its digits is 17280, while the sum is 34.

The square root of 135213838 is about 11628.1485198633. The cubic root of 135213838 is about 513.2634987739.

The spelling of 135213838 in words is "one hundred thirty-five million, two hundred thirteen thousand, eight hundred thirty-eight".