129864669 has 16 divisors (see below), whose sum is σ = 191993664. Its totient is φ = 77414400.

The previous prime is 129864661. The next prime is 129864701. The reversal of 129864669 is 966468921.

It is not a de Polignac number, because 129864669 - 2³ = 129864661 is a prime.

It is a super-2 number, since 2×129864669² = 33729664508959122, which contains 22 as substring.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129864661) 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 15 ways as a sum of consecutive naturals, for example, 30244 + ... + 34269.

It is an arithmetic number, because the mean of its divisors is an integer number (11999604).

Almost surely, 2^129864669 is an apocalyptic number.

It is an amenable number.

129864669 is a deficient number, since it is larger than the sum of its proper divisors (62128995).

129864669 is a wasteful number, since it uses less digits than its factorization.

129864669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64588.

The product of its digits is 1119744, while the sum is 51.

The square root of 129864669 is about 11395.8180487405. The cubic root of 129864669 is about 506.4038564216.

The spelling of 129864669 in words is "one hundred twenty-nine million, eight hundred sixty-four thousand, six hundred sixty-nine".