136881838 has 4 divisors (see below), whose sum is σ = 205322760. Its totient is φ = 68440918.

The previous prime is 136881817. The next prime is 136881839. The reversal of 136881838 is 838188631.

136881838 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136881839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34220458 + ... + 34220461.

It is an arithmetic number, because the mean of its divisors is an integer number (51330690).

Almost surely, 2^136881838 is an apocalyptic number.

136881838 is a deficient number, since it is larger than the sum of its proper divisors (68440922).

136881838 is an equidigital number, since it uses as much as digits as its factorization.

136881838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68440921.

The product of its digits is 221184, while the sum is 46.

The square root of 136881838 is about 11699.6511913817. The cubic root of 136881838 is about 515.3654213631.

The spelling of 136881838 in words is "one hundred thirty-six million, eight hundred eighty-one thousand, eight hundred thirty-eight".