136989 has 12 divisors (see below), whose sum is σ = 204672. Its totient is φ = 88200.

The previous prime is 136987. The next prime is 136991. The reversal of 136989 is 989631.

136989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (136987) and next prime (136991).

It is not a de Polignac number, because 136989 - 2¹ = 136987 is a prime.

It is a super-2 number, since 2×136989² = 37531972242, which contains 22 as substring.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 136989.

It is not an unprimeable number, because it can be changed into a prime (136987) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34 + ... + 524.

It is an arithmetic number, because the mean of its divisors is an integer number (17056).

2¹³⁶⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

136989 is a deficient number, since it is larger than the sum of its proper divisors (67683).

136989 is a wasteful number, since it uses less digits than its factorization.

136989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528 (or 525 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 136989 is about 370.1202507294. The cubic root of 136989 is about 51.5499875975.

The spelling of 136989 in words is "one hundred thirty-six thousand, nine hundred eighty-nine".