22685309 has 2 divisors, whose sum is σ = 22685310. Its totient is φ = 22685308.

The previous prime is 22685263. The next prime is 22685321. The reversal of 22685309 is 90358622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19829209 + 2856100 = 4453^2 + 1690^2 .

It is a cyclic number.

It is not a de Polignac number, because 22685309 - 2⁸ = 22685053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22685339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11342654 + 11342655.

It is an arithmetic number, because the mean of its divisors is an integer number (11342655).

Almost surely, 2^22685309 is an apocalyptic number.

It is an amenable number.

22685309 is a deficient number, since it is larger than the sum of its proper divisors (1).

22685309 is an equidigital number, since it uses as much as digits as its factorization.

22685309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 22685309 is about 4762.9097199086. The cubic root of 22685309 is about 283.0837237249.

The spelling of 22685309 in words is "twenty-two million, six hundred eighty-five thousand, three hundred nine".