22043729 has 4 divisors (see below), whose sum is σ = 23002176. Its totient is φ = 21085284.

The previous prime is 22043717. The next prime is 22043731. The reversal of 22043729 is 92734022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22043729 - 2⁸ = 22043473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22043789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479189 + ... + 479234.

It is an arithmetic number, because the mean of its divisors is an integer number (5750544).

Almost surely, 2^22043729 is an apocalyptic number.

It is an amenable number.

22043729 is a deficient number, since it is larger than the sum of its proper divisors (958447).

22043729 is an equidigital number, since it uses as much as digits as its factorization.

22043729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958446.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 22043729 is about 4695.0749727773. The cubic root of 22043729 is about 280.3894622831.

The spelling of 22043729 in words is "twenty-two million, forty-three thousand, seven hundred twenty-nine".