136987720 has 32 divisors (see below), whose sum is σ = 324446400. Its totient is φ = 51910848.

The previous prime is 136987703. The next prime is 136987759. The reversal of 136987720 is 27789631.

It is a happy number.

136987720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89364 + ... + 90883.

It is an arithmetic number, because the mean of its divisors is an integer number (10138950).

Almost surely, 2^136987720 is an apocalyptic number.

136987720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136987720 is an abundant number, since it is smaller than the sum of its proper divisors (187458680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

136987720 is a wasteful number, since it uses less digits than its factorization.

136987720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180277 (or 180273 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 136987720 is about 11704.1753233622. The cubic root of 136987720 is about 515.4982703917.

The spelling of 136987720 in words is "one hundred thirty-six million, nine hundred eighty-seven thousand, seven hundred twenty".