999998888807 has 2 divisors, whose sum is σ = 999998888808. Its totient is φ = 999998888806.

The previous prime is 999998888767. The next prime is 999998888843. The reversal of 999998888807 is 708888899999.

999998888807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999998888807 - 2²⁶ = 999931779943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999998888407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999444403 + 499999444404.

It is an arithmetic number, because the mean of its divisors is an integer number (499999444404).

Almost surely, 2^999998888807 is an apocalyptic number.

999998888807 is a deficient number, since it is larger than the sum of its proper divisors (1).

999998888807 is an equidigital number, since it uses as much as digits as its factorization.

999998888807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13544423424, while the sum is 92.

The spelling of 999998888807 in words is "nine hundred ninety-nine billion, nine hundred ninety-eight million, eight hundred eighty-eight thousand, eight hundred seven".