7973954309 has 2 divisors, whose sum is σ = 7973954310. Its totient is φ = 7973954308.

The previous prime is 7973954297. The next prime is 7973954353. The reversal of 7973954309 is 9034593797.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7973954209 + 100 = 89297^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 7973954309 - 2⁴ = 7973954293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7973954369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3986977154 + 3986977155.

It is an arithmetic number, because the mean of its divisors is an integer number (3986977155).

Almost surely, 2^7973954309 is an apocalyptic number.

It is an amenable number.

7973954309 is a deficient number, since it is larger than the sum of its proper divisors (1).

7973954309 is an equidigital number, since it uses as much as digits as its factorization.

7973954309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6429780, while the sum is 56.

The square root of 7973954309 is about 89297.0005599292. Note that the first 3 decimals coincide. The cubic root of 7973954309 is about 1997.8271660011.

The spelling of 7973954309 in words is "seven billion, nine hundred seventy-three million, nine hundred fifty-four thousand, three hundred nine".