396983342221 has 2 divisors, whose sum is σ = 396983342222. Its totient is φ = 396983342220.

The previous prime is 396983342023. The next prime is 396983342267. The reversal of 396983342221 is 122243389693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 350480576196 + 46502766025 = 592014^2 + 215645^2 .

It is a cyclic number.

It is not a de Polignac number, because 396983342221 - 2¹⁵ = 396983309453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396983342621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198491671110 + 198491671111.

It is an arithmetic number, because the mean of its divisors is an integer number (198491671111).

Almost surely, 2^396983342221 is an apocalyptic number.

It is an amenable number.

396983342221 is a deficient number, since it is larger than the sum of its proper divisors (1).

396983342221 is an equidigital number, since it uses as much as digits as its factorization.

396983342221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3359232, while the sum is 52.

The spelling of 396983342221 in words is "three hundred ninety-six billion, nine hundred eighty-three million, three hundred forty-two thousand, two hundred twenty-one".