129957434941 has 2 divisors, whose sum is σ = 129957434942. Its totient is φ = 129957434940.

The previous prime is 129957434939. The next prime is 129957435001. The reversal of 129957434941 is 149434759921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127727612100 + 2229822841 = 357390^2 + 47221^2 .

It is a cyclic number.

It is not a de Polignac number, because 129957434941 - 2¹ = 129957434939 is a prime.

Together with 129957434939, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129951434941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64978717470 + 64978717471.

It is an arithmetic number, because the mean of its divisors is an integer number (64978717471).

Almost surely, 2^129957434941 is an apocalyptic number.

It is an amenable number.

129957434941 is a deficient number, since it is larger than the sum of its proper divisors (1).

129957434941 is an equidigital number, since it uses as much as digits as its factorization.

129957434941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 58.

The spelling of 129957434941 in words is "one hundred twenty-nine billion, nine hundred fifty-seven million, four hundred thirty-four thousand, nine hundred forty-one".