129933771 has 16 divisors (see below), whose sum is σ = 200112768. Its totient is φ = 74115200.

The previous prime is 129933757. The next prime is 129933787. The reversal of 129933771 is 177339921.

It is a cyclic number.

It is not a de Polignac number, because 129933771 - 2¹⁴ = 129917387 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129933701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115245 + ... + 116366.

It is an arithmetic number, because the mean of its divisors is an integer number (12507048).

Almost surely, 2^129933771 is an apocalyptic number.

129933771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

129933771 is a deficient number, since it is larger than the sum of its proper divisors (70178997).

129933771 is a wasteful number, since it uses less digits than its factorization.

129933771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231642.

The product of its digits is 71442, while the sum is 42.

The square root of 129933771 is about 11398.8495472131. The cubic root of 129933771 is about 506.4936609713.

The spelling of 129933771 in words is "one hundred twenty-nine million, nine hundred thirty-three thousand, seven hundred seventy-one".