129696863 has 2 divisors, whose sum is σ = 129696864. Its totient is φ = 129696862.

The previous prime is 129696823. The next prime is 129696881. The reversal of 129696863 is 368696921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129696863 - 2⁶ = 129696799 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129696823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64848431 + 64848432.

It is an arithmetic number, because the mean of its divisors is an integer number (64848432).

Almost surely, 2^129696863 is an apocalyptic number.

129696863 is a deficient number, since it is larger than the sum of its proper divisors (1).

129696863 is an equidigital number, since it uses as much as digits as its factorization.

129696863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 839808, while the sum is 50.

The square root of 129696863 is about 11388.4530556173. The cubic root of 129696863 is about 506.1856440470.

The spelling of 129696863 in words is "one hundred twenty-nine million, six hundred ninety-six thousand, eight hundred sixty-three".