999478842079 has 2 divisors, whose sum is σ = 999478842080. Its totient is φ = 999478842078.

The previous prime is 999478842073. The next prime is 999478842107. The reversal of 999478842079 is 970248874999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999478842079 - 2¹⁵ = 999478809311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999478841996 and 999478842014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999478842073) 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, 499739421039 + 499739421040.

It is an arithmetic number, because the mean of its divisors is an integer number (499739421040).

Almost surely, 2^999478842079 is an apocalyptic number.

999478842079 is a deficient number, since it is larger than the sum of its proper divisors (1).

999478842079 is an equidigital number, since it uses as much as digits as its factorization.

999478842079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 658409472, while the sum is 76.

The spelling of 999478842079 in words is "nine hundred ninety-nine billion, four hundred seventy-eight million, eight hundred forty-two thousand, seventy-nine".