6390971 has 2 divisors, whose sum is σ = 6390972. Its totient is φ = 6390970.

The previous prime is 6390953. The next prime is 6390983. The reversal of 6390971 is 1790936.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6390971 - 2⁶ = 6390907 is a prime.

It is not a weakly prime, because it can be changed into another prime (6390871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3195485 + 3195486.

It is an arithmetic number, because the mean of its divisors is an integer number (3195486).

Almost surely, 2^6390971 is an apocalyptic number.

6390971 is a deficient number, since it is larger than the sum of its proper divisors (1).

6390971 is an equidigital number, since it uses as much as digits as its factorization.

6390971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 6390971 is about 2528.0369854889. The cubic root of 6390971 is about 185.5762020338.

Subtracting from 6390971 its sum of digits (35), we obtain a palindrome (6390936).

The spelling of 6390971 in words is "six million, three hundred ninety thousand, nine hundred seventy-one".