136728087 has 4 divisors (see below), whose sum is σ = 182304120. Its totient is φ = 91152056.

The previous prime is 136728083. The next prime is 136728091. The reversal of 136728087 is 780827631.

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

It is an interprime number because it is at equal distance from previous prime (136728083) and next prime (136728091).

It is a cyclic number.

It is not a de Polignac number, because 136728087 - 2² = 136728083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136728083) 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, 22788012 + ... + 22788017.

It is an arithmetic number, because the mean of its divisors is an integer number (45576030).

Almost surely, 2^136728087 is an apocalyptic number.

136728087 is a deficient number, since it is larger than the sum of its proper divisors (45576033).

136728087 is an equidigital number, since it uses as much as digits as its factorization.

136728087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45576032.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 136728087 is about 11693.0785937665. The cubic root of 136728087 is about 515.1723895816.

The spelling of 136728087 in words is "one hundred thirty-six million, seven hundred twenty-eight thousand, eighty-seven".