1920163943 has 2 divisors, whose sum is σ = 1920163944. Its totient is φ = 1920163942.

The previous prime is 1920163907. The next prime is 1920164003. The reversal of 1920163943 is 3493610291.

It is a weak prime.

It is an emirp because it is prime and its reverse (3493610291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1920163943 - 2⁶ = 1920163879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1920163897 and 1920163906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1920163543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960081971 + 960081972.

It is an arithmetic number, because the mean of its divisors is an integer number (960081972).

Almost surely, 2^1920163943 is an apocalyptic number.

1920163943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920163943 is an equidigital number, since it uses as much as digits as its factorization.

1920163943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 1920163943 is about 43819.6752954652. The cubic root of 1920163943 is about 1242.9283770010.

The spelling of 1920163943 in words is "one billion, nine hundred twenty million, one hundred sixty-three thousand, nine hundred forty-three".