129477734839 has 2 divisors, whose sum is σ = 129477734840. Its totient is φ = 129477734838.

The previous prime is 129477734807. The next prime is 129477734863. The reversal of 129477734839 is 938437774921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 129477734839 - 2⁵ = 129477734807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (129477734539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64738867419 + 64738867420.

It is an arithmetic number, because the mean of its divisors is an integer number (64738867420).

Almost surely, 2^129477734839 is an apocalyptic number.

129477734839 is a deficient number, since it is larger than the sum of its proper divisors (1).

129477734839 is an equidigital number, since it uses as much as digits as its factorization.

129477734839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64012032, while the sum is 64.

The spelling of 129477734839 in words is "one hundred twenty-nine billion, four hundred seventy-seven million, seven hundred thirty-four thousand, eight hundred thirty-nine".