6420599 has 2 divisors, whose sum is σ = 6420600. Its totient is φ = 6420598.

The previous prime is 6420587. The next prime is 6420683. The reversal of 6420599 is 9950246.

6420599 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6420599 - 2⁸ = 6420343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6420199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3210299 + 3210300.

It is an arithmetic number, because the mean of its divisors is an integer number (3210300).

Almost surely, 2^6420599 is an apocalyptic number.

6420599 is a deficient number, since it is larger than the sum of its proper divisors (1).

6420599 is an equidigital number, since it uses as much as digits as its factorization.

6420599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 6420599 is about 2533.8900923284. The cubic root of 6420599 is about 185.8625318707.

The spelling of 6420599 in words is "six million, four hundred twenty thousand, five hundred ninety-nine".