394199983 has 2 divisors, whose sum is σ = 394199984. Its totient is φ = 394199982.

The previous prime is 394199977. The next prime is 394200043. The reversal of 394199983 is 389991493.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 394199983 - 2²¹ = 392102831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394199903) 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, 197099991 + 197099992.

It is an arithmetic number, because the mean of its divisors is an integer number (197099992).

Almost surely, 2^394199983 is an apocalyptic number.

394199983 is a deficient number, since it is larger than the sum of its proper divisors (1).

394199983 is an equidigital number, since it uses as much as digits as its factorization.

394199983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 55.

The square root of 394199983 is about 19854.4701012140. The cubic root of 394199983 is about 733.2277061134.

The spelling of 394199983 in words is "three hundred ninety-four million, one hundred ninety-nine thousand, nine hundred eighty-three".