129744473 has 2 divisors, whose sum is σ = 129744474. Its totient is φ = 129744472.

The previous prime is 129744457. The next prime is 129744497. The reversal of 129744473 is 374447921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105616729 + 24127744 = 10277^2 + 4912^2 .

It is an emirp because it is prime and its reverse (374447921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129744473 - 2⁴ = 129744457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129744473.

It is not a weakly prime, because it can be changed into another prime (129744413) 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, 64872236 + 64872237.

It is an arithmetic number, because the mean of its divisors is an integer number (64872237).

Almost surely, 2^129744473 is an apocalyptic number.

It is an amenable number.

129744473 is a deficient number, since it is larger than the sum of its proper divisors (1).

129744473 is an equidigital number, since it uses as much as digits as its factorization.

129744473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 41.

The square root of 129744473 is about 11390.5431389377. The cubic root of 129744473 is about 506.2475744841.

The spelling of 129744473 in words is "one hundred twenty-nine million, seven hundred forty-four thousand, four hundred seventy-three".