8222729 has 4 divisors (see below), whose sum is σ = 8233680. Its totient is φ = 8211780.

The previous prime is 8222717. The next prime is 8222737. The reversal of 8222729 is 9272228.

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 a de Polignac number, because none of the positive numbers 2^k-8222729 is a prime.

It is a super-2 number, since 2×8222729² = 135226544414882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8222695 and 8222704.

It is not an unprimeable number, because it can be changed into a prime (8222749) 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, 4259 + ... + 5880.

It is an arithmetic number, because the mean of its divisors is an integer number (2058420).

Almost surely, 2^8222729 is an apocalyptic number.

It is an amenable number.

8222729 is a deficient number, since it is larger than the sum of its proper divisors (10951).

8222729 is a wasteful number, since it uses less digits than its factorization.

8222729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10950.

The product of its digits is 8064, while the sum is 32.

The square root of 8222729 is about 2867.5301218993. The cubic root of 8222729 is about 201.8391115070.

The spelling of 8222729 in words is "eight million, two hundred twenty-two thousand, seven hundred twenty-nine".