23065209 has 32 divisors (see below), whose sum is σ = 37370880. Its totient is φ = 13996800.

The previous prime is 23065199. The next prime is 23065223. The reversal of 23065209 is 90256032.

23065209 is a `hidden beast` number, since 2 + 3 + 0 + 652 + 0 + 9 = 666.

It is not a de Polignac number, because 23065209 - 2⁴ = 23065193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23065249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13419 + ... + 15039.

It is an arithmetic number, because the mean of its divisors is an integer number (1167840).

Almost surely, 2^23065209 is an apocalyptic number.

It is an amenable number.

23065209 is a deficient number, since it is larger than the sum of its proper divisors (14305671).

23065209 is a wasteful number, since it uses less digits than its factorization.

23065209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678 (or 1672 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 23065209 is about 4802.6252196065. The cubic root of 23065209 is about 284.6552063047.

The spelling of 23065209 in words is "twenty-three million, sixty-five thousand, two hundred nine".