129316970869 has 2 divisors, whose sum is σ = 129316970870. Its totient is φ = 129316970868.

The previous prime is 129316970833. The next prime is 129316970927. The reversal of 129316970869 is 968079613921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65606162769 + 63710808100 = 256137^2 + 252410^2 .

It is a cyclic number.

It is not a de Polignac number, because 129316970869 - 2¹¹ = 129316968821 is a prime.

It is a super-2 number, since 2×129316970869² (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 (129316970269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64658485434 + 64658485435.

It is an arithmetic number, because the mean of its divisors is an integer number (64658485435).

Almost surely, 2^129316970869 is an apocalyptic number.

It is an amenable number.

129316970869 is a deficient number, since it is larger than the sum of its proper divisors (1).

129316970869 is an equidigital number, since it uses as much as digits as its factorization.

129316970869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8817984, while the sum is 61.

The spelling of 129316970869 in words is "one hundred twenty-nine billion, three hundred sixteen million, nine hundred seventy thousand, eight hundred sixty-nine".