135137894 has 4 divisors (see below), whose sum is σ = 202706844. Its totient is φ = 67568946.

The previous prime is 135137887. The next prime is 135137909. The reversal of 135137894 is 498731531.

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, 33784472 + ... + 33784475.

It is an arithmetic number, because the mean of its divisors is an integer number (50676711).

Almost surely, 2^135137894 is an apocalyptic number.

135137894 is a deficient number, since it is larger than the sum of its proper divisors (67568950).

135137894 is an equidigital number, since it uses as much as digits as its factorization.

135137894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67568949.

The product of its digits is 90720, while the sum is 41.

The square root of 135137894 is about 11624.8825370410. The cubic root of 135137894 is about 513.1673878440.

The spelling of 135137894 in words is "one hundred thirty-five million, one hundred thirty-seven thousand, eight hundred ninety-four".