6239381721 has 8 divisors (see below), whose sum is σ = 8319542400. Its totient is φ = 4159404432.

The previous prime is 6239381713. The next prime is 6239381737. The reversal of 6239381721 is 1271839326.

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

It is not a de Polignac number, because 6239381721 - 2³ = 6239381713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6239381221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98176 + ... + 148718.

It is an arithmetic number, because the mean of its divisors is an integer number (1039942800).

Almost surely, 2^6239381721 is an apocalyptic number.

It is an amenable number.

6239381721 is a deficient number, since it is larger than the sum of its proper divisors (2080160679).

6239381721 is a wasteful number, since it uses less digits than its factorization.

6239381721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91695.

The product of its digits is 108864, while the sum is 42.

The square root of 6239381721 is about 78989.7570638118. The cubic root of 6239381721 is about 1840.9720093704.

The spelling of 6239381721 in words is "six billion, two hundred thirty-nine million, three hundred eighty-one thousand, seven hundred twenty-one".