1994779 has 2 divisors, whose sum is σ = 1994780. Its totient is φ = 1994778.

The previous prime is 1994777. The next prime is 1994807. The reversal of 1994779 is 9774991.

It is a weak prime.

It is an emirp because it is prime and its reverse (9774991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1994779 - 2¹ = 1994777 is a prime.

Together with 1994777, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1994777) 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, 997389 + 997390.

It is an arithmetic number, because the mean of its divisors is an integer number (997390).

2^1994779 is an apocalyptic number.

1994779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1994779 is an equidigital number, since it uses as much as digits as its factorization.

1994779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 46.

The square root of 1994779 is about 1412.3664538639. The cubic root of 1994779 is about 125.8823753209.

The spelling of 1994779 in words is "one million, nine hundred ninety-four thousand, seven hundred seventy-nine".