1918807879 has 2 divisors, whose sum is σ = 1918807880. Its totient is φ = 1918807878.

The previous prime is 1918807859. The next prime is 1918807931. The reversal of 1918807879 is 9787088191.

It is a weak prime.

It is an emirp because it is prime and its reverse (9787088191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1918807879 - 2²⁷ = 1784590151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1918807859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959403939 + 959403940.

It is an arithmetic number, because the mean of its divisors is an integer number (959403940).

Almost surely, 2^1918807879 is an apocalyptic number.

1918807879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918807879 is an equidigital number, since it uses as much as digits as its factorization.

1918807879 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 58.

The square root of 1918807879 is about 43804.1993306578. The cubic root of 1918807879 is about 1242.6357132130.

The spelling of 1918807879 in words is "one billion, nine hundred eighteen million, eight hundred seven thousand, eight hundred seventy-nine".