6223390729 has 4 divisors (see below), whose sum is σ = 6223785876. Its totient is φ = 6222995584.

The previous prime is 6223390711. The next prime is 6223390757. The reversal of 6223390729 is 9270933226.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5130427129 + 1092963600 = 71627^2 + 33060^2 .

It is a cyclic number.

It is not a de Polignac number, because 6223390729 - 2⁷ = 6223390601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6223390759) 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, 172924 + ... + 205789.

It is an arithmetic number, because the mean of its divisors is an integer number (1555946469).

Almost surely, 2^6223390729 is an apocalyptic number.

It is an amenable number.

6223390729 is a deficient number, since it is larger than the sum of its proper divisors (395147).

6223390729 is a wasteful number, since it uses less digits than its factorization.

6223390729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395146.

The product of its (nonzero) digits is 244944, while the sum is 43.

The square root of 6223390729 is about 78888.4701905164. The cubic root of 6223390729 is about 1839.3979135331.

The spelling of 6223390729 in words is "six billion, two hundred twenty-three million, three hundred ninety thousand, seven hundred twenty-nine".