129187034 has 4 divisors (see below), whose sum is σ = 193780554. Its totient is φ = 64593516.

The previous prime is 129187033. The next prime is 129187039. The reversal of 129187034 is 430781921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 121330225 + 7856809 = 11015^2 + 2803^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 129186985 and 129187003.

It is not an unprimeable number, because it can be changed into a prime (129187031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32296757 + ... + 32296760.

Almost surely, 2^129187034 is an apocalyptic number.

129187034 is a deficient number, since it is larger than the sum of its proper divisors (64593520).

129187034 is an equidigital number, since it uses as much as digits as its factorization.

129187034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64593519.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 129187034 is about 11366.0474220373. The cubic root of 129187034 is about 505.5215133344.

The spelling of 129187034 in words is "one hundred twenty-nine million, one hundred eighty-seven thousand, thirty-four".