22006729 has 2 divisors, whose sum is σ = 22006730. Its totient is φ = 22006728.

The previous prime is 22006727. The next prime is 22006739. The reversal of 22006729 is 92760022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21902400 + 104329 = 4680^2 + 323^2 .

It is a cyclic number.

It is not a de Polignac number, because 22006729 - 2¹ = 22006727 is a prime.

It is a super-2 number, since 2×22006729² = 968592242558882, which contains 22 as substring.

Together with 22006727, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 22006697 and 22006706.

It is not a weakly prime, because it can be changed into another prime (22006723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11003364 + 11003365.

It is an arithmetic number, because the mean of its divisors is an integer number (11003365).

Almost surely, 2^22006729 is an apocalyptic number.

It is an amenable number.

22006729 is a deficient number, since it is larger than the sum of its proper divisors (1).

22006729 is an equidigital number, since it uses as much as digits as its factorization.

22006729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 22006729 is about 4691.1330187919. The cubic root of 22006729 is about 280.2324982180.

The spelling of 22006729 in words is "twenty-two million, six thousand, seven hundred twenty-nine".