6390939 has 8 divisors (see below), whose sum is σ = 8665920. Its totient is φ = 4188296.

The previous prime is 6390907. The next prime is 6390947. The reversal of 6390939 is 9390936.

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 6390939 - 2⁵ = 6390907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6390897 and 6390906.

It is not an unprimeable number, because it can be changed into a prime (6390949) 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, 17877 + ... + 18230.

It is an arithmetic number, because the mean of its divisors is an integer number (1083240).

Almost surely, 2^6390939 is an apocalyptic number.

6390939 is a deficient number, since it is larger than the sum of its proper divisors (2274981).

6390939 is a wasteful number, since it uses less digits than its factorization.

6390939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36169.

The product of its (nonzero) digits is 39366, while the sum is 39.

The square root of 6390939 is about 2528.0306564597. The cubic root of 6390939 is about 185.5758923027.

The spelling of 6390939 in words is "six million, three hundred ninety thousand, nine hundred thirty-nine".