129621298969 has 8 divisors (see below), whose sum is σ = 129790539648. Its totient is φ = 129452108880.

The previous prime is 129621298943. The next prime is 129621298979. The reversal of 129621298969 is 969892126921.

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 129621298969 - 2²⁵ = 129587744537 is a prime.

It is a super-2 number, since 2×129621298969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129621298969.

It is not an unprimeable number, because it can be changed into a prime (129621298979) 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, 9716634 + ... + 9729964.

It is an arithmetic number, because the mean of its divisors is an integer number (16223817456).

Almost surely, 2^129621298969 is an apocalyptic number.

It is an amenable number.

129621298969 is a deficient number, since it is larger than the sum of its proper divisors (169240679).

129621298969 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (129621298968) it forms an eRAP, since the sums of their prime factors are consecutive (25294 and 25295).

129621298969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25295.

The product of its digits is 15116544, while the sum is 64.

The spelling of 129621298969 in words is "one hundred twenty-nine billion, six hundred twenty-one million, two hundred ninety-eight thousand, nine hundred sixty-nine".