999876577769 has 2 divisors, whose sum is σ = 999876577770. Its totient is φ = 999876577768.

The previous prime is 999876577753. The next prime is 999876577789. The reversal of 999876577769 is 967775678999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 876386184025 + 123490393744 = 936155^2 + 351412^2 .

It is a cyclic number.

It is not a de Polignac number, because 999876577769 - 2⁴ = 999876577753 is a prime.

It is a super-2 number, since 2×999876577769² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (999876577789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499938288884 + 499938288885.

It is an arithmetic number, because the mean of its divisors is an integer number (499938288885).

Almost surely, 2^999876577769 is an apocalyptic number.

It is an amenable number.

999876577769 is a deficient number, since it is larger than the sum of its proper divisors (1).

999876577769 is an equidigital number, since it uses as much as digits as its factorization.

999876577769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22684263840, while the sum is 89.

The spelling of 999876577769 in words is "nine hundred ninety-nine billion, eight hundred seventy-six million, five hundred seventy-seven thousand, seven hundred sixty-nine".