999998791903807 has 8 divisors (see below), whose sum is σ = 1004365195307456. Its totient is φ = 995637829504032.

The previous prime is 999998791903799. The next prime is 999998791903831. The reversal of 999998791903807 is 708309197899999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 999998791903807 - 2³ = 999998791903799 is a prime.

It is the 31622758-th Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999998791903907) by changing a digit.

It is a nontrivial repunit in base 31622757.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1359882588 + ... + 1360617745.

It is an arithmetic number, because the mean of its divisors is an integer number (125545649413432).

Almost surely, 2^{999998791903807} is an apocalyptic number.

999998791903807 is a deficient number, since it is larger than the sum of its proper divisors (4366403403649).

999998791903807 is a wasteful number, since it uses less digits than its factorization.

999998791903807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720501937.

The product of its (nonzero) digits is 44998172352, while the sum is 97.

The spelling of 999998791903807 in words is "nine hundred ninety-nine trillion, nine hundred ninety-eight billion, seven hundred ninety-one million, nine hundred three thousand, eight hundred seven".