99999999769 has 2 divisors, whose sum is σ = 99999999770. Its totient is φ = 99999999768.

The previous prime is 99999999763. The next prime is 99999999821. The reversal of 99999999769 is 96799999999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93781100169 + 6218899600 = 306237^2 + 78860^2 .

It is a cyclic number.

It is not a de Polignac number, because 99999999769 - 2³ = 99999999761 is a prime.

It is a super-2 number, since 2×99999999769² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99999999761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999999884 + 49999999885.

It is an arithmetic number, because the mean of its divisors is an integer number (49999999885).

Almost surely, 2^99999999769 is an apocalyptic number.

It is an amenable number.

99999999769 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999999769 is an equidigital number, since it uses as much as digits as its factorization.

99999999769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16271660538, while the sum is 94.

The spelling of 99999999769 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, seven hundred sixty-nine".