129735147 has 4 divisors (see below), whose sum is σ = 172980200. Its totient is φ = 86490096.

The previous prime is 129735139. The next prime is 129735163. The reversal of 129735147 is 741537921.

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

It is not a de Polignac number, because 129735147 - 2³ = 129735139 is a prime.

It is a super-2 number, since 2×129735147² = 33662416734223218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129735107) 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, 21622522 + ... + 21622527.

It is an arithmetic number, because the mean of its divisors is an integer number (43245050).

Almost surely, 2^129735147 is an apocalyptic number.

129735147 is a deficient number, since it is larger than the sum of its proper divisors (43245053).

129735147 is an equidigital number, since it uses as much as digits as its factorization.

129735147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43245052.

The product of its digits is 52920, while the sum is 39.

The square root of 129735147 is about 11390.1337568968. The cubic root of 129735147 is about 506.2354445442.

The spelling of 129735147 in words is "one hundred twenty-nine million, seven hundred thirty-five thousand, one hundred forty-seven".