1968575839 has 2 divisors, whose sum is σ = 1968575840. Its totient is φ = 1968575838.

The previous prime is 1968575837. The next prime is 1968575849. The reversal of 1968575839 is 9385758691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1968575839 - 2¹ = 1968575837 is a prime.

Together with 1968575837, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1968575831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984287919 + 984287920.

It is an arithmetic number, because the mean of its divisors is an integer number (984287920).

Almost surely, 2^1968575839 is an apocalyptic number.

1968575839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968575839 is an equidigital number, since it uses as much as digits as its factorization.

1968575839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 61.

The square root of 1968575839 is about 44368.6357577061. The cubic root of 1968575839 is about 1253.2875251494.

The spelling of 1968575839 in words is "one billion, nine hundred sixty-eight million, five hundred seventy-five thousand, eight hundred thirty-nine".