129800443 has 2 divisors, whose sum is σ = 129800444. Its totient is φ = 129800442.

The previous prime is 129800401. The next prime is 129800459. The reversal of 129800443 is 344008921.

It is a strong prime.

It is an emirp because it is prime and its reverse (344008921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129800443 - 2²⁵ = 96246011 is a prime.

It is not a weakly prime, because it can be changed into another prime (129800243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64900221 + 64900222.

It is an arithmetic number, because the mean of its divisors is an integer number (64900222).

Almost surely, 2^129800443 is an apocalyptic number.

129800443 is a deficient number, since it is larger than the sum of its proper divisors (1).

129800443 is an equidigital number, since it uses as much as digits as its factorization.

129800443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 129800443 is about 11392.9997366804. Note that the first 3 decimals coincide. The cubic root of 129800443 is about 506.3203601237.

The spelling of 129800443 in words is "one hundred twenty-nine million, eight hundred thousand, four hundred forty-three".