129942473 has 2 divisors, whose sum is σ = 129942474. Its totient is φ = 129942472.

The previous prime is 129942443. The next prime is 129942499. The reversal of 129942473 is 374249921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120406729 + 9535744 = 10973^2 + 3088^2 .

It is a cyclic number.

It is not a de Polignac number, because 129942473 - 2⁸ = 129942217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129942473.

It is not a weakly prime, because it can be changed into another prime (129942443) 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, 64971236 + 64971237.

It is an arithmetic number, because the mean of its divisors is an integer number (64971237).

Almost surely, 2^129942473 is an apocalyptic number.

It is an amenable number.

129942473 is a deficient number, since it is larger than the sum of its proper divisors (1).

129942473 is an equidigital number, since it uses as much as digits as its factorization.

129942473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 129942473 is about 11399.2312460095. The cubic root of 129942473 is about 506.5049677815.

The spelling of 129942473 in words is "one hundred twenty-nine million, nine hundred forty-two thousand, four hundred seventy-three".