22447709 has 4 divisors (see below), whose sum is σ = 22472604. Its totient is φ = 22422816.

The previous prime is 22447699. The next prime is 22447727. The reversal of 22447709 is 90774422.

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 8868484 + 13579225 = 2978^2 + 3685^2 .

It is a cyclic number.

It is not a de Polignac number, because 22447709 - 2⁴ = 22447693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22447739) 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 in 3 ways as a sum of consecutive naturals, for example, 11042 + ... + 12915.

It is an arithmetic number, because the mean of its divisors is an integer number (5618151).

Almost surely, 2^22447709 is an apocalyptic number.

It is an amenable number.

22447709 is a deficient number, since it is larger than the sum of its proper divisors (24895).

22447709 is an equidigital number, since it uses as much as digits as its factorization.

22447709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24894.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 22447709 is about 4737.9013286475. The cubic root of 22447709 is about 282.0919380661.

The spelling of 22447709 in words is "twenty-two million, four hundred forty-seven thousand, seven hundred nine".