999999000769 has 2 divisors, whose sum is σ = 999999000770. Its totient is φ = 999999000768.

The previous prime is 999999000743. The next prime is 999999000779. The reversal of 999999000769 is 967000999999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 558923702544 + 441075298225 = 747612^2 + 664135^2 .

It is an emirp because it is prime and its reverse (967000999999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999999000769 - 2⁹ = 999999000257 is a prime.

It is a super-2 number, since 2×999999000769² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 999999000695 and 999999000704.

It is not a weakly prime, because it can be changed into another prime (999999000709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999500384 + 499999500385.

It is an arithmetic number, because the mean of its divisors is an integer number (499999500385).

Almost surely, 2^999999000769 is an apocalyptic number.

It is an amenable number.

999999000769 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999000769 is an equidigital number, since it uses as much as digits as its factorization.

999999000769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200884698, while the sum is 76.

The spelling of 999999000769 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, seven hundred sixty-nine", and thus it is an aban number.