22943909 has 2 divisors, whose sum is σ = 22943910. Its totient is φ = 22943908.

The previous prime is 22943881. The next prime is 22943917. The reversal of 22943909 is 90934922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18679684 + 4264225 = 4322^2 + 2065^2 .

It is a cyclic number.

It is not a de Polignac number, because 22943909 - 2⁸ = 22943653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22943989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11471954 + 11471955.

It is an arithmetic number, because the mean of its divisors is an integer number (11471955).

Almost surely, 2^22943909 is an apocalyptic number.

It is an amenable number.

22943909 is a deficient number, since it is larger than the sum of its proper divisors (1).

22943909 is an equidigital number, since it uses as much as digits as its factorization.

22943909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 22943909 is about 4789.9800625890. The cubic root of 22943909 is about 284.1553281434.

The spelling of 22943909 in words is "twenty-two million, nine hundred forty-three thousand, nine hundred nine".