999796697999 has 4 divisors (see below), whose sum is σ = 1090687306920. Its totient is φ = 908906089080.

The previous prime is 999796697987. The next prime is 999796698001.

It is a happy number.

999796697999 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 999796697999 - 2²⁰ = 999795649423 is a prime.

It is a super-2 number, since 2×999796697999² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999796697929) 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, 45445304444 + ... + 45445304465.

It is an arithmetic number, because the mean of its divisors is an integer number (272671826730).

Almost surely, 2^999796697999 is an apocalyptic number.

999796697999 is a deficient number, since it is larger than the sum of its proper divisors (90890608921).

999796697999 is a wasteful number, since it uses less digits than its factorization.

999796697999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90890608920.

The product of its digits is 75934415844, while the sum is 98.

The spelling of 999796697999 in words is "nine hundred ninety-nine billion, seven hundred ninety-six million, six hundred ninety-seven thousand, nine hundred ninety-nine".