393720128273 has 2 divisors, whose sum is σ = 393720128274. Its totient is φ = 393720128272.

The previous prime is 393720128261. The next prime is 393720128317. The reversal of 393720128273 is 372821027393.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 352131867649 + 41588260624 = 593407^2 + 203932^2 .

It is a cyclic number.

It is not a de Polignac number, because 393720128273 - 2⁴ = 393720128257 is a prime.

It is not a weakly prime, because it can be changed into another prime (393720128573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196860064136 + 196860064137.

It is an arithmetic number, because the mean of its divisors is an integer number (196860064137).

Almost surely, 2^393720128273 is an apocalyptic number.

It is an amenable number.

393720128273 is a deficient number, since it is larger than the sum of its proper divisors (1).

393720128273 is an equidigital number, since it uses as much as digits as its factorization.

393720128273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 47.

The spelling of 393720128273 in words is "three hundred ninety-three billion, seven hundred twenty million, one hundred twenty-eight thousand, two hundred seventy-three".