394022393 has 2 divisors, whose sum is σ = 394022394. Its totient is φ = 394022392.

The previous prime is 394022389. The next prime is 394022467. The reversal of 394022393 is 393220493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 389391289 + 4631104 = 19733^2 + 2152^2 .

It is an emirp because it is prime and its reverse (393220493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394022393 - 2² = 394022389 is a prime.

It is not a weakly prime, because it can be changed into another prime (394022093) 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, 197011196 + 197011197.

It is an arithmetic number, because the mean of its divisors is an integer number (197011197).

Almost surely, 2^394022393 is an apocalyptic number.

It is an amenable number.

394022393 is a deficient number, since it is larger than the sum of its proper divisors (1).

394022393 is an equidigital number, since it uses as much as digits as its factorization.

394022393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 394022393 is about 19849.9973047857. The cubic root of 394022393 is about 733.1175814111.

The spelling of 394022393 in words is "three hundred ninety-four million, twenty-two thousand, three hundred ninety-three".