129532493 has 2 divisors, whose sum is σ = 129532494. Its totient is φ = 129532492.

The previous prime is 129532457. The next prime is 129532511. The reversal of 129532493 is 394235921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84400969 + 45131524 = 9187^2 + 6718^2 .

It is a cyclic number.

It is not a de Polignac number, because 129532493 - 2⁸ = 129532237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129532453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64766246 + 64766247.

It is an arithmetic number, because the mean of its divisors is an integer number (64766247).

Almost surely, 2^129532493 is an apocalyptic number.

It is an amenable number.

129532493 is a deficient number, since it is larger than the sum of its proper divisors (1).

129532493 is an equidigital number, since it uses as much as digits as its factorization.

129532493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 38.

The square root of 129532493 is about 11381.2342476552. The cubic root of 129532493 is about 505.9717172400.

The spelling of 129532493 in words is "one hundred twenty-nine million, five hundred thirty-two thousand, four hundred ninety-three".