2019764249 has 2 divisors, whose sum is σ = 2019764250. Its totient is φ = 2019764248.

The previous prime is 2019764209. The next prime is 2019764269. The reversal of 2019764249 is 9424679102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1732224400 + 287539849 = 41620^2 + 16957^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2019764249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2019764209) 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, 1009882124 + 1009882125.

It is an arithmetic number, because the mean of its divisors is an integer number (1009882125).

Almost surely, 2^2019764249 is an apocalyptic number.

It is an amenable number.

2019764249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2019764249 is an equidigital number, since it uses as much as digits as its factorization.

2019764249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 2019764249 is about 44941.7873365090. The cubic root of 2019764249 is about 1264.0576856468.

The spelling of 2019764249 in words is "two billion, nineteen million, seven hundred sixty-four thousand, two hundred forty-nine".