1968979 has 2 divisors, whose sum is σ = 1968980. Its totient is φ = 1968978.

The previous prime is 1968977. The next prime is 1968983. The reversal of 1968979 is 9798691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1968979 - 2¹ = 1968977 is a prime.

Together with 1968977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1968977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984489 + 984490.

It is an arithmetic number, because the mean of its divisors is an integer number (984490).

2^1968979 is an apocalyptic number.

1968979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968979 is an equidigital number, since it uses as much as digits as its factorization.

1968979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 49.

The square root of 1968979 is about 1403.2031214332. The cubic root of 1968979 is about 125.3373076364.

The spelling of 1968979 in words is "one million, nine hundred sixty-eight thousand, nine hundred seventy-nine".