6407879 has 2 divisors, whose sum is σ = 6407880. Its totient is φ = 6407878.

The previous prime is 6407873. The next prime is 6407881. The reversal of 6407879 is 9787046.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6407879 is a prime.

Together with 6407881, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6407873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3203939 + 3203940.

It is an arithmetic number, because the mean of its divisors is an integer number (3203940).

Almost surely, 2^6407879 is an apocalyptic number.

6407879 is a deficient number, since it is larger than the sum of its proper divisors (1).

6407879 is an equidigital number, since it uses as much as digits as its factorization.

6407879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 6407879 is about 2531.3788732626. The cubic root of 6407879 is about 185.7397118470.

The spelling of 6407879 in words is "six million, four hundred seven thousand, eight hundred seventy-nine".