129959761 has 2 divisors, whose sum is σ = 129959762. Its totient is φ = 129959760.

The previous prime is 129959741. The next prime is 129959771. The reversal of 129959761 is 167959921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129254161 + 705600 = 11369^2 + 840^2 .

It is a cyclic number.

It is not a de Polignac number, because 129959761 - 2⁷ = 129959633 is a prime.

It is not a weakly prime, because it can be changed into another prime (129959741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64979880 + 64979881.

It is an arithmetic number, because the mean of its divisors is an integer number (64979881).

Almost surely, 2^129959761 is an apocalyptic number.

It is an amenable number.

129959761 is a deficient number, since it is larger than the sum of its proper divisors (1).

129959761 is an equidigital number, since it uses as much as digits as its factorization.

129959761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 49.

The square root of 129959761 is about 11399.9895175390. The cubic root of 129959761 is about 506.5274291814.

The spelling of 129959761 in words is "one hundred twenty-nine million, nine hundred fifty-nine thousand, seven hundred sixty-one".