129645203 has 2 divisors, whose sum is σ = 129645204. Its totient is φ = 129645202.

The previous prime is 129645199. The next prime is 129645211. The reversal of 129645203 is 302546921.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (302546921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129645203 - 2² = 129645199 is a prime.

It is a super-2 number, since 2×129645203² = 33615757321822418, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129645203.

It is not a weakly prime, because it can be changed into another prime (129645233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64822601 + 64822602.

It is an arithmetic number, because the mean of its divisors is an integer number (64822602).

Almost surely, 2^129645203 is an apocalyptic number.

129645203 is a deficient number, since it is larger than the sum of its proper divisors (1).

129645203 is an equidigital number, since it uses as much as digits as its factorization.

129645203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 129645203 is about 11386.1847429242. The cubic root of 129645203 is about 506.1184282783.

The spelling of 129645203 in words is "one hundred twenty-nine million, six hundred forty-five thousand, two hundred three".