6315989 has 2 divisors, whose sum is σ = 6315990. Its totient is φ = 6315988.

The previous prime is 6315983. The next prime is 6316003. The reversal of 6315989 is 9895136.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4169764 + 2146225 = 2042^2 + 1465^2 .

It is a cyclic number.

It is not a de Polignac number, because 6315989 - 2⁴ = 6315973 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 (6315983) 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 as a sum of consecutive naturals, namely, 3157994 + 3157995.

It is an arithmetic number, because the mean of its divisors is an integer number (3157995).

Almost surely, 2^6315989 is an apocalyptic number.

It is an amenable number.

6315989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6315989 is an equidigital number, since it uses as much as digits as its factorization.

6315989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The square root of 6315989 is about 2513.1631463158. The cubic root of 6315989 is about 184.8475881299.

The spelling of 6315989 in words is "six million, three hundred fifteen thousand, nine hundred eighty-nine".