129011833 has 4 divisors (see below), whose sum is σ = 129866368. Its totient is φ = 128157300.

The previous prime is 129011821. The next prime is 129011891. The reversal of 129011833 is 338110921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 338110921 = 37 ⋅9138133.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129011833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129011803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427041 + ... + 427342.

It is an arithmetic number, because the mean of its divisors is an integer number (32466592).

Almost surely, 2^129011833 is an apocalyptic number.

It is an amenable number.

129011833 is a deficient number, since it is larger than the sum of its proper divisors (854535).

129011833 is an equidigital number, since it uses as much as digits as its factorization.

129011833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854534.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 129011833 is about 11358.3375984340. The cubic root of 129011833 is about 505.2928837262.

The spelling of 129011833 in words is "one hundred twenty-nine million, eleven thousand, eight hundred thirty-three".