22009729 has 8 divisors (see below), whose sum is σ = 25191488. Its totient is φ = 18837360.

The previous prime is 22009723. The next prime is 22009739. The reversal of 22009729 is 92790022.

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 22009729 - 2⁷ = 22009601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22009729.

It is not an unprimeable number, because it can be changed into a prime (22009723) 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, 3739 + ... + 7615.

It is an arithmetic number, because the mean of its divisors is an integer number (3148936).

Almost surely, 2^22009729 is an apocalyptic number.

It is an amenable number.

22009729 is a deficient number, since it is larger than the sum of its proper divisors (3181759).

22009729 is an equidigital number, since it uses as much as digits as its factorization.

22009729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4695.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 22009729 is about 4691.4527600734. The cubic root of 22009729 is about 280.2452315854.

The spelling of 22009729 in words is "twenty-two million, nine thousand, seven hundred twenty-nine".