129000033 has 20 divisors (see below), whose sum is σ = 199352340. Its totient is φ = 83032992.

The previous prime is 129000017. The next prime is 129000037. The reversal of 129000033 is 330000921.

It can be written as a sum of positive squares in 2 ways, for example, as 56205009 + 72795024 = 7497^2 + 8532^2 .

It is not a de Polignac number, because 129000033 - 2⁴ = 129000017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129000037) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25110 + ... + 29807.

It is an arithmetic number, because the mean of its divisors is an integer number (9967617).

Almost surely, 2^129000033 is an apocalyptic number.

It is an amenable number.

129000033 is a deficient number, since it is larger than the sum of its proper divisors (70352307).

129000033 is an equidigital number, since it uses as much as digits as its factorization.

129000033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54958 (or 54949 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 129000033 is about 11357.8181443444. The cubic root of 129000033 is about 505.2774778065.

Adding to 129000033 its reverse (330000921), we get a palindrome (459000954).

The spelling of 129000033 in words is "one hundred twenty-nine million, thirty-three", and thus it is an aban number.