129008423827 has 8 divisors (see below), whose sum is σ = 130327248240. Its totient is φ = 127690413600.

The previous prime is 129008423737. The next prime is 129008423837. The reversal of 129008423827 is 728324800921.

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 129008423827 - 2⁷ = 129008423699 is a prime.

It is a super-3 number, since 3×129008423827³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129008423837) 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, 117549 + ... + 521377.

It is an arithmetic number, because the mean of its divisors is an integer number (16290906030).

Almost surely, 2^129008423827 is an apocalyptic number.

129008423827 is a deficient number, since it is larger than the sum of its proper divisors (1318824413).

129008423827 is a wasteful number, since it uses less digits than its factorization.

129008423827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407093.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 129008423827 in words is "one hundred twenty-nine billion, eight million, four hundred twenty-three thousand, eight hundred twenty-seven".