6423185729 has 2 divisors, whose sum is σ = 6423185730. Its totient is φ = 6423185728.

The previous prime is 6423185723. The next prime is 6423185773. The reversal of 6423185729 is 9275813246.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6421618225 + 1567504 = 80135^2 + 1252^2 .

It is a cyclic number.

It is not a de Polignac number, because 6423185729 - 2⁸ = 6423185473 is a prime.

It is a super-2 number, since 2×6423185729² = 82514629818458522882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6423185723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3211592864 + 3211592865.

It is an arithmetic number, because the mean of its divisors is an integer number (3211592865).

Almost surely, 2^6423185729 is an apocalyptic number.

It is an amenable number.

6423185729 is a deficient number, since it is larger than the sum of its proper divisors (1).

6423185729 is an equidigital number, since it uses as much as digits as its factorization.

6423185729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 47.

The square root of 6423185729 is about 80144.7797988116. The cubic root of 6423185729 is about 1858.8748859989.

The spelling of 6423185729 in words is "six billion, four hundred twenty-three million, one hundred eighty-five thousand, seven hundred twenty-nine".