6429138621 has 8 divisors (see below), whose sum is σ = 8575036320. Its totient is φ = 4284666672.

The previous prime is 6429138587. The next prime is 6429138629. The reversal of 6429138621 is 1268319246.

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

It is not a de Polignac number, because 6429138621 - 2¹¹ = 6429136573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6429138629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345870 + ... + 363983.

It is an arithmetic number, because the mean of its divisors is an integer number (1071879540).

Almost surely, 2^6429138621 is an apocalyptic number.

It is an amenable number.

6429138621 is a deficient number, since it is larger than the sum of its proper divisors (2145897699).

6429138621 is a wasteful number, since it uses less digits than its factorization.

6429138621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712875.

The product of its digits is 124416, while the sum is 42.

The square root of 6429138621 is about 80181.9095619455. The cubic root of 6429138621 is about 1859.4489658596.

The spelling of 6429138621 in words is "six billion, four hundred twenty-nine million, one hundred thirty-eight thousand, six hundred twenty-one".