1996979 has 2 divisors, whose sum is σ = 1996980. Its totient is φ = 1996978.

The previous prime is 1996949. The next prime is 1997003. The reversal of 1996979 is 9796991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1996979 - 2⁸ = 1996723 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1996949) 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, 998489 + 998490.

It is an arithmetic number, because the mean of its divisors is an integer number (998490).

2^1996979 is an apocalyptic number.

1996979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1996979 is an equidigital number, since it uses as much as digits as its factorization.

1996979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 275562, while the sum is 50.

The square root of 1996979 is about 1413.1450739397. The cubic root of 1996979 is about 125.9286359973.

The spelling of 1996979 in words is "one million, nine hundred ninety-six thousand, nine hundred seventy-nine".