129521083 has 2 divisors, whose sum is σ = 129521084. Its totient is φ = 129521082.

The previous prime is 129521057. The next prime is 129521099. The reversal of 129521083 is 380125921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129521083 is a prime.

It is not a weakly prime, because it can be changed into another prime (129521023) 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, 64760541 + 64760542.

It is an arithmetic number, because the mean of its divisors is an integer number (64760542).

Almost surely, 2^129521083 is an apocalyptic number.

129521083 is a deficient number, since it is larger than the sum of its proper divisors (1).

129521083 is an equidigital number, since it uses as much as digits as its factorization.

129521083 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 129521083 is about 11380.7329728801. The cubic root of 129521083 is about 505.9568604611.

The spelling of 129521083 in words is "one hundred twenty-nine million, five hundred twenty-one thousand, eighty-three".