6213145729 has 8 divisors (see below), whose sum is σ = 7118448768. Its totient is φ = 5312270400.

The previous prime is 6213145721. The next prime is 6213145739. The reversal of 6213145729 is 9275413126.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6213145729 - 2³ = 6213145721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6213145691 and 6213145700.

It is not an unprimeable number, because it can be changed into a prime (6213145721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1103917 + ... + 1109530.

It is an arithmetic number, because the mean of its divisors is an integer number (889806096).

Almost surely, 2^6213145729 is an apocalyptic number.

It is an amenable number.

6213145729 is a deficient number, since it is larger than the sum of its proper divisors (905303039).

6213145729 is a wasteful number, since it uses less digits than its factorization.

6213145729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2213855.

The product of its digits is 90720, while the sum is 40.

The square root of 6213145729 is about 78823.5100017755. The cubic root of 6213145729 is about 1838.3880148758.

The spelling of 6213145729 in words is "six billion, two hundred thirteen million, one hundred forty-five thousand, seven hundred twenty-nine".