129939533 has 2 divisors, whose sum is σ = 129939534. Its totient is φ = 129939532.

The previous prime is 129939529. The next prime is 129939539. The reversal of 129939533 is 335939921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112741924 + 17197609 = 10618^2 + 4147^2 .

It is a cyclic number.

It is not a de Polignac number, because 129939533 - 2² = 129939529 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129939539) 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 as a sum of consecutive naturals, namely, 64969766 + 64969767.

It is an arithmetic number, because the mean of its divisors is an integer number (64969767).

Almost surely, 2^129939533 is an apocalyptic number.

It is an amenable number.

129939533 is a deficient number, since it is larger than the sum of its proper divisors (1).

129939533 is an equidigital number, since it uses as much as digits as its factorization.

129939533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 196830, while the sum is 44.

The square root of 129939533 is about 11399.1022892156. The cubic root of 129939533 is about 506.5011477940.

The spelling of 129939533 in words is "one hundred twenty-nine million, nine hundred thirty-nine thousand, five hundred thirty-three".