129661607 has 2 divisors, whose sum is σ = 129661608. Its totient is φ = 129661606.

The previous prime is 129661591. The next prime is 129661619. The reversal of 129661607 is 706166921.

It is a strong prime.

It is an emirp because it is prime and its reverse (706166921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129661607 - 2⁴ = 129661591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129661307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64830803 + 64830804.

It is an arithmetic number, because the mean of its divisors is an integer number (64830804).

Almost surely, 2^129661607 is an apocalyptic number.

129661607 is a deficient number, since it is larger than the sum of its proper divisors (1).

129661607 is an equidigital number, since it uses as much as digits as its factorization.

129661607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 129661607 is about 11386.9050667861. The cubic root of 129661607 is about 506.1397737565.

The spelling of 129661607 in words is "one hundred twenty-nine million, six hundred sixty-one thousand, six hundred seven".