853808393 has 2 divisors, whose sum is σ = 853808394. Its totient is φ = 853808392.

The previous prime is 853808383. The next prime is 853808443. The reversal of 853808393 is 393808358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 766348489 + 87459904 = 27683^2 + 9352^2 .

It is a cyclic number.

It is not a de Polignac number, because 853808393 - 2¹² = 853804297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (853808383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426904196 + 426904197.

It is an arithmetic number, because the mean of its divisors is an integer number (426904197).

Almost surely, 2^853808393 is an apocalyptic number.

It is an amenable number.

853808393 is a deficient number, since it is larger than the sum of its proper divisors (1).

853808393 is an equidigital number, since it uses as much as digits as its factorization.

853808393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 853808393 is about 29219.9998802190. Note that the first 3 decimals coincide. The cubic root of 853808393 is about 948.6808627682.

The spelling of 853808393 in words is "eight hundred fifty-three million, eight hundred eight thousand, three hundred ninety-three".