22609729 has 2 divisors, whose sum is σ = 22609730. Its totient is φ = 22609728.

The previous prime is 22609709. The next prime is 22609751. The reversal of 22609729 is 92790622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22467600 + 142129 = 4740^2 + 377^2 .

It is a cyclic number.

It is not a de Polignac number, because 22609729 - 2¹¹ = 22607681 is a prime.

It is a super-2 number, since 2×22609729² = 1022399690906882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22609709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11304864 + 11304865.

It is an arithmetic number, because the mean of its divisors is an integer number (11304865).

Almost surely, 2^22609729 is an apocalyptic number.

It is an amenable number.

22609729 is a deficient number, since it is larger than the sum of its proper divisors (1).

22609729 is an equidigital number, since it uses as much as digits as its factorization.

22609729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 22609729 is about 4754.9688747667. The cubic root of 22609729 is about 282.7689932708.

The spelling of 22609729 in words is "twenty-two million, six hundred nine thousand, seven hundred twenty-nine".