6393917 has 2 divisors, whose sum is σ = 6393918. Its totient is φ = 6393916.

The previous prime is 6393913. The next prime is 6393941. The reversal of 6393917 is 7193936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3916441 + 2477476 = 1979^2 + 1574^2 .

It is a cyclic number.

It is not a de Polignac number, because 6393917 - 2² = 6393913 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6393911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3196958 + 3196959.

It is an arithmetic number, because the mean of its divisors is an integer number (3196959).

Almost surely, 2^6393917 is an apocalyptic number.

It is an amenable number.

6393917 is a deficient number, since it is larger than the sum of its proper divisors (1).

6393917 is an equidigital number, since it uses as much as digits as its factorization.

6393917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 38.

The square root of 6393917 is about 2528.6195838837. The cubic root of 6393917 is about 185.6047122299.

The spelling of 6393917 in words is "six million, three hundred ninety-three thousand, nine hundred seventeen".