129305027 has 4 divisors (see below), whose sum is σ = 129342456. Its totient is φ = 129267600.

The previous prime is 129305003. The next prime is 129305053. The reversal of 129305027 is 720503921.

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 129305027 - 2¹² = 129300931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129304027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12938 + ... + 20639.

It is an arithmetic number, because the mean of its divisors is an integer number (32335614).

Almost surely, 2^129305027 is an apocalyptic number.

129305027 is a deficient number, since it is larger than the sum of its proper divisors (37429).

129305027 is an equidigital number, since it uses as much as digits as its factorization.

129305027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37428.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 129305027 is about 11371.2368280676. The cubic root of 129305027 is about 505.6753725555.

Adding to 129305027 its reverse (720503921), we get a palindrome (849808948).

It can be divided in two parts, 12 and 9305027, that added together give a palindrome (9305039).

The spelling of 129305027 in words is "one hundred twenty-nine million, three hundred five thousand, twenty-seven".