999699468124117 has 4 divisors (see below), whose sum is σ = 999699532664140. Its totient is φ = 999699403584096.

The previous prime is 999699468124111. The next prime is 999699468124151. The reversal of 999699468124117 is 711421864996999.

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 212086619481636 + 787612848642481 = 14563194^2 + 28064441^2 .

It is a 3-Lehmer number, since φ(999699468124117) divides (999699468124117-1)³.

It is a cyclic number.

It is not a de Polignac number, because 999699468124117 - 2⁴³ = 990903375101909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999699468124111) 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, 6454003 + ... + 45178015.

It is an arithmetic number, because the mean of its divisors is an integer number (249924883166035).

It is a Poulet number, since it divides 2^{999699468124116}-1.

Almost surely, 2^{999699468124117} is an apocalyptic number.

999699468124117 is the 25816009-th pentagonal number.

It is an amenable number.

999699468124117 is a deficient number, since it is larger than the sum of its proper divisors (64540023).

999699468124117 is a wasteful number, since it uses less digits than its factorization.

999699468124117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64540022.

The product of its digits is 3809369088, while the sum is 85.

The spelling of 999699468124117 in words is "nine hundred ninety-nine trillion, six hundred ninety-nine billion, four hundred sixty-eight million, one hundred twenty-four thousand, one hundred seventeen".