1818979 has 2 divisors, whose sum is σ = 1818980. Its totient is φ = 1818978.

The previous prime is 1818977. The next prime is 1818989. The reversal of 1818979 is 9798181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1818979 - 2¹ = 1818977 is a prime.

Together with 1818977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1818977) 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, 909489 + 909490.

It is an arithmetic number, because the mean of its divisors is an integer number (909490).

2^1818979 is an apocalyptic number.

1818979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818979 is an equidigital number, since it uses as much as digits as its factorization.

1818979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 43.

The square root of 1818979 is about 1348.6952954615. The cubic root of 1818979 is about 122.0700797762.

The spelling of 1818979 in words is "one million, eight hundred eighteen thousand, nine hundred seventy-nine".