22399609 has 8 divisors (see below), whose sum is σ = 22869000. Its totient is φ = 21935232.

The previous prime is 22399607. The next prime is 22399667. The reversal of 22399609 is 90699322.

It can be written as a sum of positive squares in 4 ways, for example, as 5359225 + 17040384 = 2315^2 + 4128^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22399609 - 2¹ = 22399607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22399607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8547 + ... + 10855.

It is an arithmetic number, because the mean of its divisors is an integer number (2858625).

Almost surely, 2^22399609 is an apocalyptic number.

It is an amenable number.

22399609 is a deficient number, since it is larger than the sum of its proper divisors (469391).

22399609 is a wasteful number, since it uses less digits than its factorization.

22399609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 22399609 is about 4732.8225193852. The cubic root of 22399609 is about 281.8903090982.

The spelling of 22399609 in words is "twenty-two million, three hundred ninety-nine thousand, six hundred nine".