6339989 has 2 divisors, whose sum is σ = 6339990. Its totient is φ = 6339988.

The previous prime is 6339947. The next prime is 6340013. The reversal of 6339989 is 9899336.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3591025 + 2748964 = 1895^2 + 1658^2 .

It is a cyclic number.

It is not a de Polignac number, because 6339989 - 2¹² = 6335893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6339919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3169994 + 3169995.

It is an arithmetic number, because the mean of its divisors is an integer number (3169995).

Almost surely, 2^6339989 is an apocalyptic number.

It is an amenable number.

6339989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6339989 is an equidigital number, since it uses as much as digits as its factorization.

6339989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 314928, while the sum is 47.

The square root of 6339989 is about 2517.9334780728. The cubic root of 6339989 is about 185.0814250771.

The spelling of 6339989 in words is "six million, three hundred thirty-nine thousand, nine hundred eighty-nine".