129999065 has 8 divisors (see below), whose sum is σ = 178284480. Its totient is φ = 89142192.

The previous prime is 129999061. The next prime is 129999097. The reversal of 129999065 is 560999921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129999065 - 2² = 129999061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129999061) 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 in 7 ways as a sum of consecutive naturals, for example, 1857095 + ... + 1857164.

It is an arithmetic number, because the mean of its divisors is an integer number (22285560).

Almost surely, 2^129999065 is an apocalyptic number.

It is an amenable number.

129999065 is a deficient number, since it is larger than the sum of its proper divisors (48285415).

129999065 is an equidigital number, since it uses as much as digits as its factorization.

129999065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3714271.

The product of its (nonzero) digits is 393660, while the sum is 50.

The square root of 129999065 is about 11401.7132484553. The cubic root of 129999065 is about 506.5784874148.

The spelling of 129999065 in words is "one hundred twenty-nine million, nine hundred ninety-nine thousand, sixty-five".