129689318393 has 2 divisors, whose sum is σ = 129689318394. Its totient is φ = 129689318392.

The previous prime is 129689318389. The next prime is 129689318401. The reversal of 129689318393 is 393813986921.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127857735184 + 1831583209 = 357572^2 + 42797^2 .

It is an emirp because it is prime and its reverse (393813986921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129689318393 - 2² = 129689318389 is a prime.

It is a super-3 number, since 3×129689318393³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (129689311393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64844659196 + 64844659197.

It is an arithmetic number, because the mean of its divisors is an integer number (64844659197).

Almost surely, 2^129689318393 is an apocalyptic number.

It is an amenable number.

129689318393 is a deficient number, since it is larger than the sum of its proper divisors (1).

129689318393 is an equidigital number, since it uses as much as digits as its factorization.

129689318393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15116544, while the sum is 62.

The spelling of 129689318393 in words is "one hundred twenty-nine billion, six hundred eighty-nine million, three hundred eighteen thousand, three hundred ninety-three".