394160881 has 2 divisors, whose sum is σ = 394160882. Its totient is φ = 394160880.

The previous prime is 394160849. The next prime is 394160927. The reversal of 394160881 is 188061493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266832225 + 127328656 = 16335^2 + 11284^2 .

It is a cyclic number.

It is not a de Polignac number, because 394160881 - 2⁵ = 394160849 is a prime.

It is a super-2 number, since 2×394160881² = 310725600221392322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (394160981) 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, 197080440 + 197080441.

It is an arithmetic number, because the mean of its divisors is an integer number (197080441).

Almost surely, 2^394160881 is an apocalyptic number.

It is an amenable number.

394160881 is a deficient number, since it is larger than the sum of its proper divisors (1).

394160881 is an equidigital number, since it uses as much as digits as its factorization.

394160881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 394160881 is about 19853.4853615178. The cubic root of 394160881 is about 733.2034615514.

The spelling of 394160881 in words is "three hundred ninety-four million, one hundred sixty thousand, eight hundred eighty-one".