6339981 has 8 divisors (see below), whose sum is σ = 8479744. Its totient is φ = 4213440.

The previous prime is 6339947. The next prime is 6339989. The reversal of 6339981 is 1899336.

6339981 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 6339981 - 2¹⁰ = 6338957 is a prime.

It is a super-2 number, since 2×6339981² = 80390718160722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6339989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2125 + ... + 4146.

It is an arithmetic number, because the mean of its divisors is an integer number (1059968).

Almost surely, 2^6339981 is an apocalyptic number.

It is an amenable number.

6339981 is a deficient number, since it is larger than the sum of its proper divisors (2139763).

6339981 is a wasteful number, since it uses less digits than its factorization.

6339981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6611.

The product of its digits is 34992, while the sum is 39.

The square root of 6339981 is about 2517.9318894680. The cubic root of 6339981 is about 185.0813472298.

The spelling of 6339981 in words is "six million, three hundred thirty-nine thousand, nine hundred eighty-one".