129994993 has 2 divisors, whose sum is σ = 129994994. Its totient is φ = 129994992.

The previous prime is 129994987. The next prime is 129995003. The reversal of 129994993 is 399499921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98545329 + 31449664 = 9927^2 + 5608^2 .

It is an emirp because it is prime and its reverse (399499921) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129994993 is a prime.

It is not a weakly prime, because it can be changed into another prime (129994693) 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, 64997496 + 64997497.

It is an arithmetic number, because the mean of its divisors is an integer number (64997497).

Almost surely, 2^129994993 is an apocalyptic number.

It is an amenable number.

129994993 is a deficient number, since it is larger than the sum of its proper divisors (1).

129994993 is an equidigital number, since it uses as much as digits as its factorization.

129994993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1417176, while the sum is 55.

The square root of 129994993 is about 11401.5346774020. The cubic root of 129994993 is about 506.5731981226.

The spelling of 129994993 in words is "one hundred twenty-nine million, nine hundred ninety-four thousand, nine hundred ninety-three".