129173203 has 2 divisors, whose sum is σ = 129173204. Its totient is φ = 129173202.

The previous prime is 129173183. The next prime is 129173207. The reversal of 129173203 is 302371921.

It is a strong prime.

It is an emirp because it is prime and its reverse (302371921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129173203 - 2¹³ = 129165011 is a prime.

It is not a weakly prime, because it can be changed into another prime (129173207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64586601 + 64586602.

It is an arithmetic number, because the mean of its divisors is an integer number (64586602).

Almost surely, 2^129173203 is an apocalyptic number.

129173203 is a deficient number, since it is larger than the sum of its proper divisors (1).

129173203 is an equidigital number, since it uses as much as digits as its factorization.

129173203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 129173203 is about 11365.4389708449. The cubic root of 129173203 is about 505.5034720047.

The spelling of 129173203 in words is "one hundred twenty-nine million, one hundred seventy-three thousand, two hundred three".