129612033 has 6 divisors (see below), whose sum is σ = 187217394. Its totient is φ = 86408016.

The previous prime is 129611981. The next prime is 129612047. The reversal of 129612033 is 330216921.

129612033 is a `hidden beast` number, since 12 + 9 + 612 + 0 + 33 = 666.

It can be written as a sum of positive squares in only one way, i.e., 76947984 + 52664049 = 8772^2 + 7257^2 .

It is not a de Polignac number, because 129612033 - 2¹² = 129607937 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 129611988 and 129612006.

It is not an unprimeable number, because it can be changed into a prime (129612533) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7200660 + ... + 7200677.

It is an arithmetic number, because the mean of its divisors is an integer number (31202899).

Almost surely, 2^129612033 is an apocalyptic number.

It is an amenable number.

129612033 is a deficient number, since it is larger than the sum of its proper divisors (57605361).

129612033 is a wasteful number, since it uses less digits than its factorization.

129612033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14401343 (or 14401340 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 129612033 is about 11384.7280599934. The cubic root of 129612033 is about 506.0752607724.

Adding to 129612033 its reverse (330216921), we get a palindrome (459828954).

The spelling of 129612033 in words is "one hundred twenty-nine million, six hundred twelve thousand, thirty-three".