129134069 has 2 divisors, whose sum is σ = 129134070. Its totient is φ = 129134068.

The previous prime is 129134059. The next prime is 129134081. The reversal of 129134069 is 960431921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117831025 + 11303044 = 10855^2 + 3362^2 .

It is a cyclic number.

It is not a de Polignac number, because 129134069 - 2⁸ = 129133813 is a prime.

It is a super-2 number, since 2×129134069² = 33351215552993522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129134039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64567034 + 64567035.

It is an arithmetic number, because the mean of its divisors is an integer number (64567035).

Almost surely, 2^129134069 is an apocalyptic number.

It is an amenable number.

129134069 is a deficient number, since it is larger than the sum of its proper divisors (1).

129134069 is an equidigital number, since it uses as much as digits as its factorization.

129134069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 129134069 is about 11363.7172175305. The cubic root of 129134069 is about 505.4524181471.

The spelling of 129134069 in words is "one hundred twenty-nine million, one hundred thirty-four thousand, sixty-nine".