2019539923 has 2 divisors, whose sum is σ = 2019539924. Its totient is φ = 2019539922.

The previous prime is 2019539867. The next prime is 2019539927. The reversal of 2019539923 is 3299359102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2019539923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2019539923.

It is not a weakly prime, because it can be changed into another prime (2019539927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1009769961 + 1009769962.

It is an arithmetic number, because the mean of its divisors is an integer number (1009769962).

Almost surely, 2^2019539923 is an apocalyptic number.

2019539923 is a deficient number, since it is larger than the sum of its proper divisors (1).

2019539923 is an equidigital number, since it uses as much as digits as its factorization.

2019539923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131220, while the sum is 43.

The square root of 2019539923 is about 44939.2915275708. The cubic root of 2019539923 is about 1264.0108862075.

The spelling of 2019539923 in words is "two billion, nineteen million, five hundred thirty-nine thousand, nine hundred twenty-three".