2019678979 has 2 divisors, whose sum is σ = 2019678980. Its totient is φ = 2019678978.

The previous prime is 2019678953. The next prime is 2019679009. The reversal of 2019678979 is 9798769102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2019678979 - 2⁹ = 2019678467 is a prime.

It is not a weakly prime, because it can be changed into another prime (2019678949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1009839489 + 1009839490.

It is an arithmetic number, because the mean of its divisors is an integer number (1009839490).

Almost surely, 2^2019678979 is an apocalyptic number.

2019678979 is a deficient number, since it is larger than the sum of its proper divisors (1).

2019678979 is an equidigital number, since it uses as much as digits as its factorization.

2019678979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3429216, while the sum is 58.

The square root of 2019678979 is about 44940.8386548360. The cubic root of 2019678979 is about 1264.0398968189.

The spelling of 2019678979 in words is "two billion, nineteen million, six hundred seventy-eight thousand, nine hundred seventy-nine".