129833405 has 12 divisors (see below), whose sum is σ = 168707700. Its totient is φ = 95876352.

The previous prime is 129833401. The next prime is 129833447. The reversal of 129833405 is 504338921.

It can be written as a sum of positive squares in 6 ways, for example, as 21631801 + 108201604 = 4651^2 + 10402^2 .

It is not a de Polignac number, because 129833405 - 2² = 129833401 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129833401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75980 + ... + 77669.

It is an arithmetic number, because the mean of its divisors is an integer number (14058975).

Almost surely, 2^129833405 is an apocalyptic number.

It is an amenable number.

129833405 is a deficient number, since it is larger than the sum of its proper divisors (38874295).

129833405 is a wasteful number, since it uses less digits than its factorization.

129833405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153680 (or 153667 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 129833405 is about 11394.4462348988. The cubic root of 129833405 is about 506.3632154453.

The spelling of 129833405 in words is "one hundred twenty-nine million, eight hundred thirty-three thousand, four hundred five".