129927653 has 2 divisors, whose sum is σ = 129927654. Its totient is φ = 129927652.

The previous prime is 129927613. The next prime is 129927659. The reversal of 129927653 is 356729921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103897249 + 26030404 = 10193^2 + 5102^2 .

It is a cyclic number.

It is not a de Polignac number, because 129927653 - 2⁸ = 129927397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129927659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64963826 + 64963827.

It is an arithmetic number, because the mean of its divisors is an integer number (64963827).

Almost surely, 2^129927653 is an apocalyptic number.

It is an amenable number.

129927653 is a deficient number, since it is larger than the sum of its proper divisors (1).

129927653 is an equidigital number, since it uses as much as digits as its factorization.

129927653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 44.

The square root of 129927653 is about 11398.5811836386. The cubic root of 129927653 is about 506.4857113396.

The spelling of 129927653 in words is "one hundred twenty-nine million, nine hundred twenty-seven thousand, six hundred fifty-three".