32138609 has 4 divisors (see below), whose sum is σ = 32164260. Its totient is φ = 32112960.

The previous prime is 32138597. The next prime is 32138611. The reversal of 32138609 is 90683123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90683123 = 6691 ⋅13553.

It can be written as a sum of positive squares in 2 ways, for example, as 28058209 + 4080400 = 5297^2 + 2020^2 .

It is a cyclic number.

It is not a de Polignac number, because 32138609 - 2⁴ = 32138593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (32138009) 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, 10844 + ... + 13485.

It is an arithmetic number, because the mean of its divisors is an integer number (8041065).

Almost surely, 2^32138609 is an apocalyptic number.

It is an amenable number.

32138609 is a deficient number, since it is larger than the sum of its proper divisors (25651).

32138609 is a wasteful number, since it uses less digits than its factorization.

32138609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25650.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 32138609 is about 5669.0924317742. The cubic root of 32138609 is about 317.9379419531.

The spelling of 32138609 in words is "thirty-two million, one hundred thirty-eight thousand, six hundred nine".