394997683 has 2 divisors, whose sum is σ = 394997684. Its totient is φ = 394997682.

The previous prime is 394997657. The next prime is 394997693. The reversal of 394997683 is 386799493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 394997683 - 2⁹ = 394997171 is a prime.

It is not a weakly prime, because it can be changed into another prime (394997623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197498841 + 197498842.

It is an arithmetic number, because the mean of its divisors is an integer number (197498842).

Almost surely, 2^394997683 is an apocalyptic number.

394997683 is a deficient number, since it is larger than the sum of its proper divisors (1).

394997683 is an equidigital number, since it uses as much as digits as its factorization.

394997683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8817984, while the sum is 58.

The square root of 394997683 is about 19874.5486238053. The cubic root of 394997683 is about 733.7219574910.

The spelling of 394997683 in words is "three hundred ninety-four million, nine hundred ninety-seven thousand, six hundred eighty-three".