999715709204101 has 4 divisors (see below), whose sum is σ = 999715788249804. Its totient is φ = 999715630158400.

The previous prime is 999715709204077. The next prime is 999715709204131. The reversal of 999715709204101 is 101402907517999.

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 703243306000225 + 296472403203876 = 26518735^2 + 17218374^2 .

It is a 3-Lehmer number, since φ(999715709204101) divides (999715709204101-1)³.

It is a cyclic number.

It is not a de Polignac number, because 999715709204101 - 2⁴³ = 990919616181893 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 (999715709204131) 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, 15809140 + ... + 47427421.

It is an arithmetic number, because the mean of its divisors is an integer number (249928947062451).

It is a Poulet number, since it divides 2^{999715709204100}-1.

Almost surely, 2^{999715709204101} is an apocalyptic number.

999715709204101 is the 15809141-st decagonal number.

It is an amenable number.

999715709204101 is a deficient number, since it is larger than the sum of its proper divisors (79045703).

999715709204101 is a wasteful number, since it uses less digits than its factorization.

999715709204101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79045702.

The product of its (nonzero) digits is 12859560, while the sum is 64.

The spelling of 999715709204101 in words is "nine hundred ninety-nine trillion, seven hundred fifteen billion, seven hundred nine million, two hundred four thousand, one hundred one".