129873143 has 2 divisors, whose sum is σ = 129873144. Its totient is φ = 129873142.

The previous prime is 129873127. The next prime is 129873179. The reversal of 129873143 is 341378921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129873143 - 2⁴ = 129873127 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 129873097 and 129873106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129873343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64936571 + 64936572.

It is an arithmetic number, because the mean of its divisors is an integer number (64936572).

Almost surely, 2^129873143 is an apocalyptic number.

129873143 is a deficient number, since it is larger than the sum of its proper divisors (1).

129873143 is an equidigital number, since it uses as much as digits as its factorization.

129873143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 129873143 is about 11396.1898457335. The cubic root of 129873143 is about 506.4148708953.

The spelling of 129873143 in words is "one hundred twenty-nine million, eight hundred seventy-three thousand, one hundred forty-three".