129933505 has 8 divisors (see below), whose sum is σ = 167914152. Its totient is φ = 95950848.

The previous prime is 129933497. The next prime is 129933511. The reversal of 129933505 is 505339921.

It can be written as a sum of positive squares in 4 ways, for example, as 12341169 + 117592336 = 3513^2 + 10844^2 .

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 129933505 - 2³ = 129933497 is a prime.

It is a Duffinian 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, 999424 + ... + 999553.

It is an arithmetic number, because the mean of its divisors is an integer number (20989269).

Almost surely, 2^129933505 is an apocalyptic number.

It is an amenable number.

129933505 is a deficient number, since it is larger than the sum of its proper divisors (37980647).

129933505 is a wasteful number, since it uses less digits than its factorization.

129933505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998995.

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 129933505 is about 11398.8378793630. The cubic root of 129933505 is about 506.4933153403.

The spelling of 129933505 in words is "one hundred twenty-nine million, nine hundred thirty-three thousand, five hundred five".