22911409 has 4 divisors (see below), whose sum is σ = 22927716. Its totient is φ = 22895104.

The previous prime is 22911407. The next prime is 22911431. The reversal of 22911409 is 90411922.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6265009 + 16646400 = 2503^2 + 4080^2 .

It is a cyclic number.

It is not a de Polignac number, because 22911409 - 2¹ = 22911407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22911401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5824 + ... + 8929.

It is an arithmetic number, because the mean of its divisors is an integer number (5731929).

Almost surely, 2^22911409 is an apocalyptic number.

It is an amenable number.

22911409 is a deficient number, since it is larger than the sum of its proper divisors (16307).

22911409 is a wasteful number, since it uses less digits than its factorization.

22911409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16306.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 22911409 is about 4786.5863619076. The cubic root of 22911409 is about 284.0210962640.

The spelling of 22911409 in words is "twenty-two million, nine hundred eleven thousand, four hundred nine".