129540473 has 2 divisors, whose sum is σ = 129540474. Its totient is φ = 129540472.

The previous prime is 129540457. The next prime is 129540517. The reversal of 129540473 is 374045921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129322384 + 218089 = 11372^2 + 467^2 .

It is an emirp because it is prime and its reverse (374045921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129540473 - 2⁴ = 129540457 is a prime.

It is equal to p_7353665 and since 129540473 and 7353665 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (129543473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64770236 + 64770237.

It is an arithmetic number, because the mean of its divisors is an integer number (64770237).

Almost surely, 2^129540473 is an apocalyptic number.

It is an amenable number.

129540473 is a deficient number, since it is larger than the sum of its proper divisors (1).

129540473 is an equidigital number, since it uses as much as digits as its factorization.

129540473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 129540473 is about 11381.5848193474. The cubic root of 129540473 is about 505.9821073521.

The spelling of 129540473 in words is "one hundred twenty-nine million, five hundred forty thousand, four hundred seventy-three".