401318381 has 2 divisors, whose sum is σ = 401318382. Its totient is φ = 401318380.

The previous prime is 401318321. The next prime is 401318417. The reversal of 401318381 is 183813104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 281065225 + 120253156 = 16765^2 + 10966^2 .

It is a cyclic number.

It is not a de Polignac number, because 401318381 - 2¹⁴ = 401301997 is a prime.

It is a super-2 number, since 2×401318381² = 322112885856922322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401318321) 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, 200659190 + 200659191.

It is an arithmetic number, because the mean of its divisors is an integer number (200659191).

Almost surely, 2^401318381 is an apocalyptic number.

It is an amenable number.

401318381 is a deficient number, since it is larger than the sum of its proper divisors (1).

401318381 is an equidigital number, since it uses as much as digits as its factorization.

401318381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 401318381 is about 20032.9324114070. The cubic root of 401318381 is about 737.6149048582.

The spelling of 401318381 in words is "four hundred one million, three hundred eighteen thousand, three hundred eighty-one".