6223729 has 4 divisors (see below), whose sum is σ = 6228720. Its totient is φ = 6218740.

The previous prime is 6223727. The next prime is 6223739. The reversal of 6223729 is 9273226.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9273226 = 2 ⋅4636613.

It is a cyclic number.

It is not a de Polignac number, because 6223729 - 2¹ = 6223727 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6223729.

It is not an unprimeable number, because it can be changed into a prime (6223727) 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, 1194 + ... + 3724.

It is an arithmetic number, because the mean of its divisors is an integer number (1557180).

Almost surely, 2^6223729 is an apocalyptic number.

It is an amenable number.

6223729 is a deficient number, since it is larger than the sum of its proper divisors (4991).

6223729 is a wasteful number, since it uses less digits than its factorization.

6223729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4990.

The product of its digits is 9072, while the sum is 31.

The square root of 6223729 is about 2494.7402670418. The cubic root of 6223729 is about 183.9431239616.

The spelling of 6223729 in words is "six million, two hundred twenty-three thousand, seven hundred twenty-nine".