6390407 has 2 divisors, whose sum is σ = 6390408. Its totient is φ = 6390406.

The previous prime is 6390401. The next prime is 6390409. The reversal of 6390407 is 7040936.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6390407 is a prime.

Together with 6390409, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6390407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6390401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3195203 + 3195204.

It is an arithmetic number, because the mean of its divisors is an integer number (3195204).

Almost surely, 2^6390407 is an apocalyptic number.

6390407 is a deficient number, since it is larger than the sum of its proper divisors (1).

6390407 is an equidigital number, since it uses as much as digits as its factorization.

6390407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 6390407 is about 2527.9254340269. The cubic root of 6390407 is about 185.5707428708.

The spelling of 6390407 in words is "six million, three hundred ninety thousand, four hundred seven".