129170027 has 8 divisors (see below), whose sum is σ = 150636000. Its totient is φ = 110716872.

The previous prime is 129170021. The next prime is 129170033. The reversal of 129170027 is 720071921.

It is an interprime number because it is at equal distance from previous prime (129170021) and next prime (129170033).

It is not a de Polignac number, because 129170027 - 2²² = 124975723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129170021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187952 + ... + 188637.

It is an arithmetic number, because the mean of its divisors is an integer number (18829500).

Almost surely, 2^129170027 is an apocalyptic number.

129170027 is a deficient number, since it is larger than the sum of its proper divisors (21465973).

129170027 is an frugal number, since it uses more digits than its factorization.

129170027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376610 (or 376596 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 129170027 is about 11365.2992481500. The cubic root of 129170027 is about 505.4993290088.

The spelling of 129170027 in words is "one hundred twenty-nine million, one hundred seventy thousand, twenty-seven".