138829126829 has 2 divisors, whose sum is σ = 138829126830. Its totient is φ = 138829126828.

The previous prime is 138829126819. The next prime is 138829126873. The reversal of 138829126829 is 928621928831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85206777604 + 53622349225 = 291902^2 + 231565^2 .

It is a cyclic number.

It is not a de Polignac number, because 138829126829 - 2³² = 134534159533 is a prime.

It is a super-2 number, since 2×138829126829² (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 (138829126819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69414563414 + 69414563415.

It is an arithmetic number, because the mean of its divisors is an integer number (69414563415).

Almost surely, 2^138829126829 is an apocalyptic number.

It is an amenable number.

138829126829 is a deficient number, since it is larger than the sum of its proper divisors (1).

138829126829 is an equidigital number, since it uses as much as digits as its factorization.

138829126829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5971968, while the sum is 59.

The spelling of 138829126829 in words is "one hundred thirty-eight billion, eight hundred twenty-nine million, one hundred twenty-six thousand, eight hundred twenty-nine".