7973954189 has 2 divisors, whose sum is σ = 7973954190. Its totient is φ = 7973954188.

The previous prime is 7973954117. The next prime is 7973954237. The reversal of 7973954189 is 9814593797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7519838089 + 454116100 = 86717^2 + 21310^2 .

It is a cyclic number.

It is not a de Polignac number, because 7973954189 - 2²⁰ = 7972905613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7973954689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3986977094 + 3986977095.

It is an arithmetic number, because the mean of its divisors is an integer number (3986977095).

Almost surely, 2^7973954189 is an apocalyptic number.

It is an amenable number.

7973954189 is a deficient number, since it is larger than the sum of its proper divisors (1).

7973954189 is an equidigital number, since it uses as much as digits as its factorization.

7973954189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17146080, while the sum is 62.

The square root of 7973954189 is about 89296.9998880142. Note that the first 3 decimals coincide. The cubic root of 7973954189 is about 1997.8271559793.

The spelling of 7973954189 in words is "seven billion, nine hundred seventy-three million, nine hundred fifty-four thousand, one hundred eighty-nine".