12129769 has 2 divisors, whose sum is σ = 12129770. Its totient is φ = 12129768.

The previous prime is 12129737. The next prime is 12129781. The reversal of 12129769 is 96792121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11155600 + 974169 = 3340^2 + 987^2 .

It is an emirp because it is prime and its reverse (96792121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12129769 - 2⁵ = 12129737 is a prime.

It is a super-2 number, since 2×12129769² = 294262591986722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12124769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6064884 + 6064885.

It is an arithmetic number, because the mean of its divisors is an integer number (6064885).

Almost surely, 2^12129769 is an apocalyptic number.

It is an amenable number.

12129769 is a deficient number, since it is larger than the sum of its proper divisors (1).

12129769 is an equidigital number, since it uses as much as digits as its factorization.

12129769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 37.

The square root of 12129769 is about 3482.7817904658. The cubic root of 12129769 is about 229.7651604267.

It can be divided in two parts, 121 and 29769, that added together give a triangular number (29890 = T₂₄₄).

The spelling of 12129769 in words is "twelve million, one hundred twenty-nine thousand, seven hundred sixty-nine".