129170103 has 4 divisors (see below), whose sum is σ = 172226808. Its totient is φ = 86113400.

The previous prime is 129170101. The next prime is 129170141. The reversal of 129170103 is 301071921.

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

It is a cyclic number.

It is not a de Polignac number, because 129170103 - 2¹ = 129170101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129170101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21528348 + ... + 21528353.

It is an arithmetic number, because the mean of its divisors is an integer number (43056702).

Almost surely, 2^129170103 is an apocalyptic number.

129170103 is a deficient number, since it is larger than the sum of its proper divisors (43056705).

129170103 is an equidigital number, since it uses as much as digits as its factorization.

129170103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43056704.

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 129170103 is about 11365.3025916603. The cubic root of 129170103 is about 505.4994281492.

The spelling of 129170103 in words is "one hundred twenty-nine million, one hundred seventy thousand, one hundred three".