23601209 has 2 divisors, whose sum is σ = 23601210. Its totient is φ = 23601208.

The previous prime is 23601187. The next prime is 23601217. The reversal of 23601209 is 90210632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13897984 + 9703225 = 3728^2 + 3115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23601209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23601229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11800604 + 11800605.

It is an arithmetic number, because the mean of its divisors is an integer number (11800605).

Almost surely, 2^23601209 is an apocalyptic number.

It is an amenable number.

23601209 is a deficient number, since it is larger than the sum of its proper divisors (1).

23601209 is an equidigital number, since it uses as much as digits as its factorization.

23601209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 23601209 is about 4858.1075533586. The cubic root of 23601209 is about 286.8433264506.

The spelling of 23601209 in words is "twenty-three million, six hundred one thousand, two hundred nine".