9999999769 has 2 divisors, whose sum is σ = 9999999770. Its totient is φ = 9999999768.

The previous prime is 9999999727. The next prime is 9999999781. The reversal of 9999999769 is 9679999999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9992601369 + 7398400 = 99963^2 + 2720^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999999769 - 2¹³ = 9999991577 is a prime.

It is a super-2 number, since 2×9999999769² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9999999169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999999884 + 4999999885.

It is an arithmetic number, because the mean of its divisors is an integer number (4999999885).

Almost surely, 2^9999999769 is an apocalyptic number.

It is an amenable number.

9999999769 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999999769 is an equidigital number, since it uses as much as digits as its factorization.

9999999769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1807962282, while the sum is 85.

The square root of 9999999769 is about 99999.9988450000. The cubic root of 9999999769 is about 2154.4346734427.

The spelling of 9999999769 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, seven hundred sixty-nine".