2019978353 has 2 divisors, whose sum is σ = 2019978354. Its totient is φ = 2019978352.

The previous prime is 2019978287. The next prime is 2019978379. The reversal of 2019978353 is 3538799102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1988089744 + 31888609 = 44588^2 + 5647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2019978353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2019978298 and 2019978307.

It is not a weakly prime, because it can be changed into another prime (2019978253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1009989176 + 1009989177.

It is an arithmetic number, because the mean of its divisors is an integer number (1009989177).

Almost surely, 2^2019978353 is an apocalyptic number.

It is an amenable number.

2019978353 is a deficient number, since it is larger than the sum of its proper divisors (1).

2019978353 is an equidigital number, since it uses as much as digits as its factorization.

2019978353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 2019978353 is about 44944.1692881290. The cubic root of 2019978353 is about 1264.1023493156.

The spelling of 2019978353 in words is "two billion, nineteen million, nine hundred seventy-eight thousand, three hundred fifty-three".