1920163907 has 2 divisors, whose sum is σ = 1920163908. Its totient is φ = 1920163906.

The previous prime is 1920163891. The next prime is 1920163943. The reversal of 1920163907 is 7093610291.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1920163907 - 2⁴ = 1920163891 is a prime.

It is not a weakly prime, because it can be changed into another prime (1920183907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960081953 + 960081954.

It is an arithmetic number, because the mean of its divisors is an integer number (960081954).

Almost surely, 2^1920163907 is an apocalyptic number.

1920163907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920163907 is an equidigital number, since it uses as much as digits as its factorization.

1920163907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 1920163907 is about 43819.6748846908. The cubic root of 1920163907 is about 1242.9283692334.

The spelling of 1920163907 in words is "one billion, nine hundred twenty million, one hundred sixty-three thousand, nine hundred seven".