129268339531 has 2 divisors, whose sum is σ = 129268339532. Its totient is φ = 129268339530.

The previous prime is 129268339481. The next prime is 129268339589. The reversal of 129268339531 is 135933862921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129268339531 - 2¹¹ = 129268337483 is a prime.

It is a super-2 number, since 2×129268339531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (129268339331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64634169765 + 64634169766.

It is an arithmetic number, because the mean of its divisors is an integer number (64634169766).

Almost surely, 2^129268339531 is an apocalyptic number.

129268339531 is a deficient number, since it is larger than the sum of its proper divisors (1).

129268339531 is an equidigital number, since it uses as much as digits as its factorization.

129268339531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2099520, while the sum is 52.

The spelling of 129268339531 in words is "one hundred twenty-nine billion, two hundred sixty-eight million, three hundred thirty-nine thousand, five hundred thirty-one".