6423215729 has 4 divisors (see below), whose sum is σ = 7340817984. Its totient is φ = 5505613476.

The previous prime is 6423215719. The next prime is 6423215731. The reversal of 6423215729 is 9275123246.

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 6423215729 - 2²⁰ = 6422167153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6423215719) 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, 458801117 + ... + 458801130.

It is an arithmetic number, because the mean of its divisors is an integer number (1835204496).

Almost surely, 2^6423215729 is an apocalyptic number.

It is an amenable number.

6423215729 is a deficient number, since it is larger than the sum of its proper divisors (917602255).

6423215729 is an equidigital number, since it uses as much as digits as its factorization.

6423215729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917602254.

The product of its digits is 181440, while the sum is 41.

The square root of 6423215729 is about 80144.9669598784. The cubic root of 6423215729 is about 1858.8777800021.

The spelling of 6423215729 in words is "six billion, four hundred twenty-three million, two hundred fifteen thousand, seven hundred twenty-nine".