129769969 has 8 divisors (see below), whose sum is σ = 150822720. Its totient is φ = 109345776.

The previous prime is 129769963. The next prime is 129770021. The reversal of 129769969 is 969967921.

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 129769969 - 2¹⁹ = 129245681 is a prime.

It is a super-2 number, since 2×129769969² = 33680489708521922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129769963) 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, 156694 + ... + 157519.

It is an arithmetic number, because the mean of its divisors is an integer number (18852840).

Almost surely, 2^129769969 is an apocalyptic number.

It is an amenable number.

129769969 is a deficient number, since it is larger than the sum of its proper divisors (21052751).

129769969 is an equidigital number, since it uses as much as digits as its factorization.

129769969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314279.

The product of its digits is 3306744, while the sum is 58.

The square root of 129769969 is about 11391.6622579850. The cubic root of 129769969 is about 506.2807331035.

The spelling of 129769969 in words is "one hundred twenty-nine million, seven hundred sixty-nine thousand, nine hundred sixty-nine".