22906409 has 2 divisors, whose sum is σ = 22906410. Its totient is φ = 22906408.

The previous prime is 22906399. The next prime is 22906417. The reversal of 22906409 is 90460922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16581184 + 6325225 = 4072^2 + 2515^2 .

It is a cyclic number.

It is not a de Polignac number, because 22906409 - 2⁴ = 22906393 is a prime.

It is not a weakly prime, because it can be changed into another prime (22906109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11453204 + 11453205.

It is an arithmetic number, because the mean of its divisors is an integer number (11453205).

Almost surely, 2^22906409 is an apocalyptic number.

It is an amenable number.

22906409 is a deficient number, since it is larger than the sum of its proper divisors (1).

22906409 is an equidigital number, since it uses as much as digits as its factorization.

22906409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 22906409 is about 4786.0640405243. The cubic root of 22906409 is about 284.0004339410. Note that the first 3 decimals are identical.

The spelling of 22906409 in words is "twenty-two million, nine hundred six thousand, four hundred nine".