129383885 has 8 divisors (see below), whose sum is σ = 156129120. Its totient is φ = 102928144.

The previous prime is 129383879. The next prime is 129383899. The reversal of 129383885 is 588383921.

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 129383885 - 2⁴ = 129383869 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71387 + ... + 73176.

It is an arithmetic number, because the mean of its divisors is an integer number (19516140).

Almost surely, 2^129383885 is an apocalyptic number.

It is an amenable number.

129383885 is a deficient number, since it is larger than the sum of its proper divisors (26745235).

129383885 is a wasteful number, since it uses less digits than its factorization.

129383885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144747.

The product of its digits is 414720, while the sum is 47.

The square root of 129383885 is about 11374.7037324055. The cubic root of 129383885 is about 505.7781487734.

The spelling of 129383885 in words is "one hundred twenty-nine million, three hundred eighty-three thousand, eight hundred eighty-five".