129093656669 has 2 divisors, whose sum is σ = 129093656670. Its totient is φ = 129093656668.

The previous prime is 129093656603. The next prime is 129093656683. The reversal of 129093656669 is 966656390921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 103772891044 + 25320765625 = 322138^2 + 159125^2 .

It is a cyclic number.

It is not a de Polignac number, because 129093656669 - 2⁸ = 129093656413 is a prime.

It is a super-2 number, since 2×129093656669² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129093656689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64546828334 + 64546828335.

It is an arithmetic number, because the mean of its divisors is an integer number (64546828335).

Almost surely, 2^129093656669 is an apocalyptic number.

It is an amenable number.

129093656669 is a deficient number, since it is larger than the sum of its proper divisors (1).

129093656669 is an equidigital number, since it uses as much as digits as its factorization.

129093656669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28343520, while the sum is 62.

The spelling of 129093656669 in words is "one hundred twenty-nine billion, ninety-three million, six hundred fifty-six thousand, six hundred sixty-nine".