999612003931201 has 4 divisors (see below), whose sum is σ = 999612082972804. Its totient is φ = 999611924889600.

The previous prime is 999612003931127. The next prime is 999612003931223. The reversal of 999612003931201 is 102139300216999.

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 can be written as a sum of positive squares in 2 ways, for example, as 82916486010801 + 916695517920400 = 9105849^2 + 30276980^2 .

It is a 3-Lehmer number, since φ(999612003931201) divides (999612003931201-1)³.

It is a cyclic number.

It is not a de Polignac number, because 999612003931201 - 2⁹ = 999612003930689 is a prime.

It is a deceptive number, since it divides R_{999612003931200}.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999612003931271) 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, 15808320 + ... + 47424961.

It is an arithmetic number, because the mean of its divisors is an integer number (249903020743201).

It is a Poulet number, since it divides 2^{999612003931200}-1.

Almost surely, 2^{999612003931201} is an apocalyptic number.

999612003931201 is the 15808321-st decagonal number.

It is an amenable number.

999612003931201 is a deficient number, since it is larger than the sum of its proper divisors (79041603).

999612003931201 is a wasteful number, since it uses less digits than its factorization.

999612003931201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79041602.

The product of its (nonzero) digits is 1417176, while the sum is 55.

The spelling of 999612003931201 in words is "nine hundred ninety-nine trillion, six hundred twelve billion, three million, nine hundred thirty-one thousand, two hundred one".