1920173873 has 2 divisors, whose sum is σ = 1920173874. Its totient is φ = 1920173872.

The previous prime is 1920173813. The next prime is 1920173909. The reversal of 1920173873 is 3783710291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1917826849 + 2347024 = 43793^2 + 1532^2 .

It is a cyclic number.

It is not a de Polignac number, because 1920173873 - 2⁶ = 1920173809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1920173873.

It is not a weakly prime, because it can be changed into another prime (1920173803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960086936 + 960086937.

It is an arithmetic number, because the mean of its divisors is an integer number (960086937).

Almost surely, 2^1920173873 is an apocalyptic number.

It is an amenable number.

1920173873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1920173873 is an equidigital number, since it uses as much as digits as its factorization.

1920173873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 1920173873 is about 43819.7886005855. The cubic root of 1920173873 is about 1242.9305195711.

The spelling of 1920173873 in words is "one billion, nine hundred twenty million, one hundred seventy-three thousand, eight hundred seventy-three".