2136609 has 6 divisors (see below), whose sum is σ = 3086226. Its totient is φ = 1424400.

The previous prime is 2136601. The next prime is 2136643. The reversal of 2136609 is 9066312.

It is a happy number.

2136609 is a `hidden beast` number, since 21 + 36 + 609 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1096209 + 1040400 = 1047^2 + 1020^2 .

It is not a de Polignac number, because 2136609 - 2³ = 2136601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2136601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118692 + ... + 118709.

It is an arithmetic number, because the mean of its divisors is an integer number (514371).

2^2136609 is an apocalyptic number.

It is an amenable number.

2136609 is a deficient number, since it is larger than the sum of its proper divisors (949617).

2136609 is a wasteful number, since it uses less digits than its factorization.

2136609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237407 (or 237404 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2136609 is about 1461.7144043896. The cubic root of 2136609 is about 128.7977721989.

The spelling of 2136609 in words is "two million, one hundred thirty-six thousand, six hundred nine".