839347969 has 2 divisors, whose sum is σ = 839347970. Its totient is φ = 839347968.

The previous prime is 839347967. The next prime is 839347991. The reversal of 839347969 is 969743938.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 574081600 + 265266369 = 23960^2 + 16287^2 .

It is a cyclic number.

It is not a de Polignac number, because 839347969 - 2¹ = 839347967 is a prime.

It is a super-2 number, since 2×839347969² = 1409010026128849922, which contains 22 as substring.

Together with 839347967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (839347961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 419673984 + 419673985.

It is an arithmetic number, because the mean of its divisors is an integer number (419673985).

Almost surely, 2^839347969 is an apocalyptic number.

It is an amenable number.

839347969 is a deficient number, since it is larger than the sum of its proper divisors (1).

839347969 is an equidigital number, since it uses as much as digits as its factorization.

839347969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8817984, while the sum is 58.

The square root of 839347969 is about 28971.5027052447. The cubic root of 839347969 is about 943.2945993188.

The spelling of 839347969 in words is "eight hundred thirty-nine million, three hundred forty-seven thousand, nine hundred sixty-nine".