2119728173 has 2 divisors, whose sum is σ = 2119728174. Its totient is φ = 2119728172.

The previous prime is 2119728109. The next prime is 2119728209. The reversal of 2119728173 is 3718279112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2116276009 + 3452164 = 46003^2 + 1858^2 .

It is a cyclic number.

It is not a de Polignac number, because 2119728173 - 2⁶ = 2119728109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2119728173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2119722173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059864086 + 1059864087.

It is an arithmetic number, because the mean of its divisors is an integer number (1059864087).

Almost surely, 2^2119728173 is an apocalyptic number.

It is an amenable number.

2119728173 is a deficient number, since it is larger than the sum of its proper divisors (1).

2119728173 is an equidigital number, since it uses as much as digits as its factorization.

2119728173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336, while the sum is 41.

The square root of 2119728173 is about 46040.5057856666. The cubic root of 2119728173 is about 1284.5767500874.

The spelling of 2119728173 in words is "two billion, one hundred nineteen million, seven hundred twenty-eight thousand, one hundred seventy-three".