394993 has 2 divisors, whose sum is σ = 394994. Its totient is φ = 394992.

The previous prime is 394987. The next prime is 395023. The reversal of 394993 is 399493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374544 + 20449 = 612^2 + 143^2 .

It is an emirp because it is prime and its reverse (399493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394993 - 2⁹ = 394481 is a prime.

394993 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (394943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197496 + 197497.

It is an arithmetic number, because the mean of its divisors is an integer number (197497).

2³⁹⁴⁹⁹³ is an apocalyptic number.

It is an amenable number.

394993 is a deficient number, since it is larger than the sum of its proper divisors (1).

394993 is an equidigital number, since it uses as much as digits as its factorization.

394993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 37.

The square root of 394993 is about 628.4846855732. The cubic root of 394993 is about 73.3719057868.

The spelling of 394993 in words is "three hundred ninety-four thousand, nine hundred ninety-three".