129003869 has 2 divisors, whose sum is σ = 129003870. Its totient is φ = 129003868.

The previous prime is 129003857. The next prime is 129003911. The reversal of 129003869 is 968300921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92256025 + 36747844 = 9605^2 + 6062^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129003869 is a prime.

It is a super-2 number, since 2×129003869² = 33283996433938322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129003839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64501934 + 64501935.

It is an arithmetic number, because the mean of its divisors is an integer number (64501935).

Almost surely, 2^129003869 is an apocalyptic number.

It is an amenable number.

129003869 is a deficient number, since it is larger than the sum of its proper divisors (1).

129003869 is an equidigital number, since it uses as much as digits as its factorization.

129003869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 129003869 is about 11357.9870135513. The cubic root of 129003869 is about 505.2824861391.

The spelling of 129003869 in words is "one hundred twenty-nine million, three thousand, eight hundred sixty-nine".