6379999 has 2 divisors, whose sum is σ = 6380000. Its totient is φ = 6379998.

The previous prime is 6379963. The next prime is 6380027. The reversal of 6379999 is 9999736.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6379999 - 2⁷ = 6379871 is a prime.

6379999 is a modest number, since divided by 9999 gives 637 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6379909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3189999 + 3190000.

It is an arithmetic number, because the mean of its divisors is an integer number (3190000).

Almost surely, 2^6379999 is an apocalyptic number.

6379999 is a deficient number, since it is larger than the sum of its proper divisors (1).

6379999 is an equidigital number, since it uses as much as digits as its factorization.

6379999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 826686, while the sum is 52.

The square root of 6379999 is about 2525.8659901111. The cubic root of 6379999 is about 185.4699423113.

The spelling of 6379999 in words is "six million, three hundred seventy-nine thousand, nine hundred ninety-nine".