6404427979 has 2 divisors, whose sum is σ = 6404427980. Its totient is φ = 6404427978.

The previous prime is 6404427973. The next prime is 6404428027. The reversal of 6404427979 is 9797244046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6404427979 - 2³ = 6404427971 is a prime.

It is not a weakly prime, because it can be changed into another prime (6404427971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3202213989 + 3202213990.

It is an arithmetic number, because the mean of its divisors is an integer number (3202213990).

Almost surely, 2^6404427979 is an apocalyptic number.

6404427979 is a deficient number, since it is larger than the sum of its proper divisors (1).

6404427979 is an equidigital number, since it uses as much as digits as its factorization.

6404427979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 52.

The square root of 6404427979 is about 80027.6700835405. The cubic root of 6404427979 is about 1857.0636192727.

The spelling of 6404427979 in words is "six billion, four hundred four million, four hundred twenty-seven thousand, nine hundred seventy-nine".