839413021 has 8 divisors (see below), whose sum is σ = 846661088. Its totient is φ = 832194000.

The previous prime is 839413013. The next prime is 839413039. The reversal of 839413021 is 120314938.

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 839413021 - 2³ = 839413013 is a prime.

It is a super-2 number, since 2×839413021² = 1409228439648692882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (839413921) 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, 52906 + ... + 66916.

It is an arithmetic number, because the mean of its divisors is an integer number (105832636).

Almost surely, 2^839413021 is an apocalyptic number.

It is an amenable number.

839413021 is a deficient number, since it is larger than the sum of its proper divisors (7248067).

839413021 is a wasteful number, since it uses less digits than its factorization.

839413021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14523.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 839413021 is about 28972.6253729275. The cubic root of 839413021 is about 943.3189680818.

Adding to 839413021 its reverse (120314938), we get a palindrome (959727959).

The spelling of 839413021 in words is "eight hundred thirty-nine million, four hundred thirteen thousand, twenty-one".