129476441 has 2 divisors, whose sum is σ = 129476442. Its totient is φ = 129476440.

The previous prime is 129476423. The next prime is 129476443. The reversal of 129476441 is 144674921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92083216 + 37393225 = 9596^2 + 6115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129476441 is a prime.

Together with 129476443, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 129476395 and 129476404.

It is not a weakly prime, because it can be changed into another prime (129476443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64738220 + 64738221.

It is an arithmetic number, because the mean of its divisors is an integer number (64738221).

Almost surely, 2^129476441 is an apocalyptic number.

It is an amenable number.

129476441 is a deficient number, since it is larger than the sum of its proper divisors (1).

129476441 is an equidigital number, since it uses as much as digits as its factorization.

129476441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 129476441 is about 11378.7715066258. The cubic root of 129476441 is about 505.8987244389.

The spelling of 129476441 in words is "one hundred twenty-nine million, four hundred seventy-six thousand, four hundred forty-one".