80129239 has 2 divisors, whose sum is σ = 80129240. Its totient is φ = 80129238.

The previous prime is 80129221. The next prime is 80129297. The reversal of 80129239 is 93292108.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80129239 - 2⁷ = 80129111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80129209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40064619 + 40064620.

It is an arithmetic number, because the mean of its divisors is an integer number (40064620).

Almost surely, 2^80129239 is an apocalyptic number.

80129239 is a deficient number, since it is larger than the sum of its proper divisors (1).

80129239 is an equidigital number, since it uses as much as digits as its factorization.

80129239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 80129239 is about 8951.4936742423. The cubic root of 80129239 is about 431.1188439915.

The spelling of 80129239 in words is "eighty million, one hundred twenty-nine thousand, two hundred thirty-nine".