129983861 has 8 divisors (see below), whose sum is σ = 149465664. Its totient is φ = 110730240.

The previous prime is 129983857. The next prime is 129983891. The reversal of 129983861 is 168389921.

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 129983861 - 2² = 129983857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129983851) 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 7 ways as a sum of consecutive naturals, for example, 55820 + ... + 58101.

It is an arithmetic number, because the mean of its divisors is an integer number (18683208).

Almost surely, 2^129983861 is an apocalyptic number.

It is an amenable number.

129983861 is a deficient number, since it is larger than the sum of its proper divisors (19481803).

129983861 is a wasteful number, since it uses less digits than its factorization.

129983861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114091.

The product of its digits is 186624, while the sum is 47.

The square root of 129983861 is about 11401.0464870555. The cubic root of 129983861 is about 506.5587377353.

The spelling of 129983861 in words is "one hundred twenty-nine million, nine hundred eighty-three thousand, eight hundred sixty-one".