129896669 has 8 divisors (see below), whose sum is σ = 148522560. Its totient is φ = 111288096.

The previous prime is 129896659. The next prime is 129896671. The reversal of 129896669 is 966698921.

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 129896669 - 2²⁴ = 113119453 is a prime.

It is a super-2 number, since 2×129896669² = 33746289234591122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129896629) 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, 25142 + ... + 29864.

It is an arithmetic number, because the mean of its divisors is an integer number (18565320).

Almost surely, 2^129896669 is an apocalyptic number.

It is an amenable number.

129896669 is a deficient number, since it is larger than the sum of its proper divisors (18625891).

129896669 is an equidigital number, since it uses as much as digits as its factorization.

129896669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8659.

The product of its digits is 2519424, while the sum is 56.

The square root of 129896669 is about 11397.2219860806. The cubic root of 129896669 is about 506.4454473914.

The spelling of 129896669 in words is "one hundred twenty-nine million, eight hundred ninety-six thousand, six hundred sixty-nine".