6403686379 has 2 divisors, whose sum is σ = 6403686380. Its totient is φ = 6403686378.

The previous prime is 6403686347. The next prime is 6403686397. The reversal of 6403686379 is 9736863046.

Together with next prime (6403686397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6403686379 - 2⁵ = 6403686347 is a prime.

It is not a weakly prime, because it can be changed into another prime (6403680379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3201843189 + 3201843190.

It is an arithmetic number, because the mean of its divisors is an integer number (3201843190).

Almost surely, 2^6403686379 is an apocalyptic number.

6403686379 is a deficient number, since it is larger than the sum of its proper divisors (1).

6403686379 is an equidigital number, since it uses as much as digits as its factorization.

6403686379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 52.

The square root of 6403686379 is about 80023.0365519830. The cubic root of 6403686379 is about 1856.9919370165.

The spelling of 6403686379 in words is "six billion, four hundred three million, six hundred eighty-six thousand, three hundred seventy-nine".