394340693 has 2 divisors, whose sum is σ = 394340694. Its totient is φ = 394340692.

The previous prime is 394340647. The next prime is 394340707. The reversal of 394340693 is 396043493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394340164 + 529 = 19858^2 + 23^2 .

It is a cyclic number.

It is not a de Polignac number, because 394340693 - 2⁶ = 394340629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 394340693.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394340623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197170346 + 197170347.

It is an arithmetic number, because the mean of its divisors is an integer number (197170347).

Almost surely, 2^394340693 is an apocalyptic number.

It is an amenable number.

394340693 is a deficient number, since it is larger than the sum of its proper divisors (1).

394340693 is an equidigital number, since it uses as much as digits as its factorization.

394340693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 41.

The square root of 394340693 is about 19858.0133195645. The cubic root of 394340693 is about 733.3149378076.

The spelling of 394340693 in words is "three hundred ninety-four million, three hundred forty thousand, six hundred ninety-three".