129438796859 has 4 divisors (see below), whose sum is σ = 129444001680. Its totient is φ = 129433592040.

The previous prime is 129438796853. The next prime is 129438796901. The reversal of 129438796859 is 958697834921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 958697834921 = 9433 ⋅101632337.

It is a cyclic number.

It is not a de Polignac number, because 129438796859 - 2⁴ = 129438796843 is a prime.

It is a super-3 number, since 3×129438796859³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129438796792 and 129438796801.

It is not an unprimeable number, because it can be changed into a prime (129438796853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2564927 + ... + 2614904.

It is an arithmetic number, because the mean of its divisors is an integer number (32361000420).

Almost surely, 2^129438796859 is an apocalyptic number.

129438796859 is a deficient number, since it is larger than the sum of its proper divisors (5204821).

129438796859 is an equidigital number, since it uses as much as digits as its factorization.

129438796859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5204820.

The product of its digits is 235146240, while the sum is 71.

The spelling of 129438796859 in words is "one hundred twenty-nine billion, four hundred thirty-eight million, seven hundred ninety-six thousand, eight hundred fifty-nine".