22723009 has 2 divisors, whose sum is σ = 22723010. Its totient is φ = 22723008.

The previous prime is 22723003. The next prime is 22723013. The reversal of 22723009 is 90032722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17247409 + 5475600 = 4153^2 + 2340^2 .

It is a cyclic number.

It is not a de Polignac number, because 22723009 - 2¹¹ = 22720961 is a prime.

It is not a weakly prime, because it can be changed into another prime (22723003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11361504 + 11361505.

It is an arithmetic number, because the mean of its divisors is an integer number (11361505).

Almost surely, 2^22723009 is an apocalyptic number.

It is an amenable number.

22723009 is a deficient number, since it is larger than the sum of its proper divisors (1).

22723009 is an equidigital number, since it uses as much as digits as its factorization.

22723009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 22723009 is about 4766.8657417637. The cubic root of 22723009 is about 283.2404529084.

The spelling of 22723009 in words is "twenty-two million, seven hundred twenty-three thousand, nine".