129055273 has 2 divisors, whose sum is σ = 129055274. Its totient is φ = 129055272.

The previous prime is 129055271. The next prime is 129055337. The reversal of 129055273 is 372550921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82228624 + 46826649 = 9068^2 + 6843^2 .

It is an emirp because it is prime and its reverse (372550921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129055273 - 2¹ = 129055271 is a prime.

Together with 129055271, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (129055271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64527636 + 64527637.

It is an arithmetic number, because the mean of its divisors is an integer number (64527637).

Almost surely, 2^129055273 is an apocalyptic number.

It is an amenable number.

129055273 is a deficient number, since it is larger than the sum of its proper divisors (1).

129055273 is an equidigital number, since it uses as much as digits as its factorization.

129055273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 129055273 is about 11360.2496891574. The cubic root of 129055273 is about 505.3495903068.

The spelling of 129055273 in words is "one hundred twenty-nine million, fifty-five thousand, two hundred seventy-three".