9922729 has 4 divisors (see below), whose sum is σ = 10354176. Its totient is φ = 9491284.

The previous prime is 9922721. The next prime is 9922739. The reversal of 9922729 is 9272299.

9922729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9922729 - 2³ = 9922721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9922691 and 9922700.

It is not an unprimeable number, because it can be changed into a prime (9922721) 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, 215689 + ... + 215734.

It is an arithmetic number, because the mean of its divisors is an integer number (2588544).

Almost surely, 2^9922729 is an apocalyptic number.

It is an amenable number.

9922729 is a deficient number, since it is larger than the sum of its proper divisors (431447).

9922729 is a wasteful number, since it uses less digits than its factorization.

9922729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431446.

The product of its digits is 40824, while the sum is 40.

The square root of 9922729 is about 3150.0363489966. The cubic root of 9922729 is about 214.8871157909.

It can be divided in two parts, 992 and 2729, that added together give a square (3721 = 61²).

The spelling of 9922729 in words is "nine million, nine hundred twenty-two thousand, seven hundred twenty-nine".