129615443 has 2 divisors, whose sum is σ = 129615444. Its totient is φ = 129615442.

The previous prime is 129615341. The next prime is 129615449. The reversal of 129615443 is 344516921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129615443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (129615449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64807721 + 64807722.

It is an arithmetic number, because the mean of its divisors is an integer number (64807722).

Almost surely, 2^129615443 is an apocalyptic number.

129615443 is a deficient number, since it is larger than the sum of its proper divisors (1).

129615443 is an equidigital number, since it uses as much as digits as its factorization.

129615443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 129615443 is about 11384.8778210396. The cubic root of 129615443 is about 506.0796988930.

The spelling of 129615443 in words is "one hundred twenty-nine million, six hundred fifteen thousand, four hundred forty-three".