129988513 has 2 divisors, whose sum is σ = 129988514. Its totient is φ = 129988512.

The previous prime is 129988493. The next prime is 129988517. The reversal of 129988513 is 315889921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99440784 + 30547729 = 9972^2 + 5527^2 .

It is an emirp because it is prime and its reverse (315889921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129988513 is a prime.

It is not a weakly prime, because it can be changed into another prime (129988517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64994256 + 64994257.

It is an arithmetic number, because the mean of its divisors is an integer number (64994257).

Almost surely, 2^129988513 is an apocalyptic number.

It is an amenable number.

129988513 is a deficient number, since it is larger than the sum of its proper divisors (1).

129988513 is an equidigital number, since it uses as much as digits as its factorization.

129988513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 46.

The square root of 129988513 is about 11401.2505015897. The cubic root of 129988513 is about 506.5647807500.

The spelling of 129988513 in words is "one hundred twenty-nine million, nine hundred eighty-eight thousand, five hundred thirteen".