23345209 has 2 divisors, whose sum is σ = 23345210. Its totient is φ = 23345208.

The previous prime is 23345177. The next prime is 23345219. The reversal of 23345209 is 90254332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11751184 + 11594025 = 3428^2 + 3405^2 .

It is a cyclic number.

It is not a de Polignac number, because 23345209 - 2⁵ = 23345177 is a prime.

It is not a weakly prime, because it can be changed into another prime (23345219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11672604 + 11672605.

It is an arithmetic number, because the mean of its divisors is an integer number (11672605).

Almost surely, 2^23345209 is an apocalyptic number.

It is an amenable number.

23345209 is a deficient number, since it is larger than the sum of its proper divisors (1).

23345209 is an equidigital number, since it uses as much as digits as its factorization.

23345209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 23345209 is about 4831.6880073117. The cubic root of 23345209 is about 285.8024333617.

The spelling of 23345209 in words is "twenty-three million, three hundred forty-five thousand, two hundred nine".