999841933366867 has 4 divisors (see below), whose sum is σ = 999842012417560. Its totient is φ = 999841854316176.

The previous prime is 999841933366847. The next prime is 999841933366901. The reversal of 999841933366867 is 768663339148999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 4-Lehmer number, since φ(999841933366867) divides (999841933366867-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 999841933366867 - 2¹⁵ = 999841933334099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999841933366847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15810138 + ... + 47430415.

It is an arithmetic number, because the mean of its divisors is an integer number (249960503104390).

It is a Poulet number, since it divides 2^{999841933366866}-1.

Almost surely, 2^{999841933366867} is an apocalyptic number.

999841933366867 is the 15810139-th decagonal number.

999841933366867 is a deficient number, since it is larger than the sum of its proper divisors (79050693).

999841933366867 is a wasteful number, since it uses less digits than its factorization.

999841933366867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79050692.

The product of its digits is 68568643584, while the sum is 91.

The spelling of 999841933366867 in words is "nine hundred ninety-nine trillion, eight hundred forty-one billion, nine hundred thirty-three million, three hundred sixty-six thousand, eight hundred sixty-seven".