129411943 has 2 divisors, whose sum is σ = 129411944. Its totient is φ = 129411942.

The previous prime is 129411941. The next prime is 129411979. The reversal of 129411943 is 349114921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129411943 - 2¹ = 129411941 is a prime.

Together with 129411941, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 129411899 and 129411908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129411941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64705971 + 64705972.

It is an arithmetic number, because the mean of its divisors is an integer number (64705972).

Almost surely, 2^129411943 is an apocalyptic number.

129411943 is a deficient number, since it is larger than the sum of its proper divisors (1).

129411943 is an equidigital number, since it uses as much as digits as its factorization.

129411943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 34.

The square root of 129411943 is about 11375.9370163517. The cubic root of 129411943 is about 505.8147069007.

It can be divided in two parts, 12941 and 1943, that added together give a square (14884 = 122²).

The spelling of 129411943 in words is "one hundred twenty-nine million, four hundred eleven thousand, nine hundred forty-three".