394761893 has 2 divisors, whose sum is σ = 394761894. Its totient is φ = 394761892.

The previous prime is 394761859. The next prime is 394761911. The reversal of 394761893 is 398167493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 364313569 + 30448324 = 19087^2 + 5518^2 .

It is an emirp because it is prime and its reverse (398167493) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 394761893 - 2⁸ = 394761637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (394761823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197380946 + 197380947.

It is an arithmetic number, because the mean of its divisors is an integer number (197380947).

Almost surely, 2^394761893 is an apocalyptic number.

It is an amenable number.

394761893 is a deficient number, since it is larger than the sum of its proper divisors (1).

394761893 is an equidigital number, since it uses as much as digits as its factorization.

394761893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The square root of 394761893 is about 19868.6157796662. The cubic root of 394761893 is about 733.5759323845.

The spelling of 394761893 in words is "three hundred ninety-four million, seven hundred sixty-one thousand, eight hundred ninety-three".