129385939 has 2 divisors, whose sum is σ = 129385940. Its totient is φ = 129385938.

The previous prime is 129385937. The next prime is 129385967. The reversal of 129385939 is 939583921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 129385939 - 2¹ = 129385937 is a prime.

Together with 129385937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 129385892 and 129385901.

It is not a weakly prime, because it can be changed into another prime (129385931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64692969 + 64692970.

It is an arithmetic number, because the mean of its divisors is an integer number (64692970).

Almost surely, 2^129385939 is an apocalyptic number.

129385939 is a deficient number, since it is larger than the sum of its proper divisors (1).

129385939 is an equidigital number, since it uses as much as digits as its factorization.

129385939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 524880, while the sum is 49.

The square root of 129385939 is about 11374.7940201131. The cubic root of 129385939 is about 505.7808252088.

The spelling of 129385939 in words is "one hundred twenty-nine million, three hundred eighty-five thousand, nine hundred thirty-nine".