406806688979 has 2 divisors, whose sum is σ = 406806688980. Its totient is φ = 406806688978.

The previous prime is 406806688963. The next prime is 406806688987. The reversal of 406806688979 is 979886608604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 406806688979 - 2⁴ = 406806688963 is a prime.

It is not a weakly prime, because it can be changed into another prime (406806688879) 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, 203403344489 + 203403344490.

It is an arithmetic number, because the mean of its divisors is an integer number (203403344490).

Almost surely, 2^406806688979 is an apocalyptic number.

406806688979 is a deficient number, since it is larger than the sum of its proper divisors (1).

406806688979 is an equidigital number, since it uses as much as digits as its factorization.

406806688979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 250822656, while the sum is 71.

The spelling of 406806688979 in words is "four hundred six billion, eight hundred six million, six hundred eighty-eight thousand, nine hundred seventy-nine".