394523893 has 4 divisors (see below), whose sum is σ = 394938828. Its totient is φ = 394108960.

The previous prime is 394523881. The next prime is 394523897. The reversal of 394523893 is 398325493.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58644964 + 335878929 = 7658^2 + 18327^2 .

It is a cyclic number.

It is not a de Polignac number, because 394523893 - 2⁵ = 394523861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394523897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206038 + ... + 207943.

It is an arithmetic number, because the mean of its divisors is an integer number (98734707).

Almost surely, 2^394523893 is an apocalyptic number.

It is an amenable number.

394523893 is a deficient number, since it is larger than the sum of its proper divisors (414935).

394523893 is an equidigital number, since it uses as much as digits as its factorization.

394523893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414934.

The product of its digits is 699840, while the sum is 46.

The square root of 394523893 is about 19862.6255313843. The cubic root of 394523893 is about 733.4284796428.

The spelling of 394523893 in words is "three hundred ninety-four million, five hundred twenty-three thousand, eight hundred ninety-three".