136618989 has 32 divisors (see below), whose sum is σ = 203288064. Its totient is φ = 81077760.

The previous prime is 136618973. The next prime is 136618997. The reversal of 136618989 is 989816631.

It is not a de Polignac number, because 136618989 - 2⁴ = 136618973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136618969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133299 + ... + 134319.

It is an arithmetic number, because the mean of its divisors is an integer number (6352752).

Almost surely, 2^136618989 is an apocalyptic number.

It is an amenable number.

136618989 is a deficient number, since it is larger than the sum of its proper divisors (66669075).

136618989 is a wasteful number, since it uses less digits than its factorization.

136618989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157.

The product of its digits is 559872, while the sum is 51.

The square root of 136618989 is about 11688.4125953869. The cubic root of 136618989 is about 515.0353310979.

The spelling of 136618989 in words is "one hundred thirty-six million, six hundred eighteen thousand, nine hundred eighty-nine".