129057647 has 2 divisors, whose sum is σ = 129057648. Its totient is φ = 129057646.

The previous prime is 129057589. The next prime is 129057653. The reversal of 129057647 is 746750921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129057647 - 2⁶ = 129057583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129057667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64528823 + 64528824.

It is an arithmetic number, because the mean of its divisors is an integer number (64528824).

Almost surely, 2^129057647 is an apocalyptic number.

129057647 is a deficient number, since it is larger than the sum of its proper divisors (1).

129057647 is an equidigital number, since it uses as much as digits as its factorization.

129057647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 129057647 is about 11360.3541758169. The cubic root of 129057647 is about 505.3526889599.

The spelling of 129057647 in words is "one hundred twenty-nine million, fifty-seven thousand, six hundred forty-seven".