136143886 has 4 divisors (see below), whose sum is σ = 204215832. Its totient is φ = 68071942.

The previous prime is 136143883. The next prime is 136143899. The reversal of 136143886 is 688341631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 688341631 = 23 ⋅29927897.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136143883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34035970 + ... + 34035973.

It is an arithmetic number, because the mean of its divisors is an integer number (51053958).

Almost surely, 2^136143886 is an apocalyptic number.

136143886 is a deficient number, since it is larger than the sum of its proper divisors (68071946).

136143886 is an equidigital number, since it uses as much as digits as its factorization.

136143886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68071945.

The product of its digits is 82944, while the sum is 40.

The square root of 136143886 is about 11668.0712202146. The cubic root of 136143886 is about 514.4376127517.

The spelling of 136143886 in words is "one hundred thirty-six million, one hundred forty-three thousand, eight hundred eighty-six".