400336943 has 2 divisors, whose sum is σ = 400336944. Its totient is φ = 400336942.

The previous prime is 400336939. The next prime is 400337059. The reversal of 400336943 is 349633004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400336943 - 2² = 400336939 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400336913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200168471 + 200168472.

It is an arithmetic number, because the mean of its divisors is an integer number (200168472).

Almost surely, 2^400336943 is an apocalyptic number.

400336943 is a deficient number, since it is larger than the sum of its proper divisors (1).

400336943 is an equidigital number, since it uses as much as digits as its factorization.

400336943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 32.

The square root of 400336943 is about 20008.4218018313. The cubic root of 400336943 is about 737.0131264358.

Adding to 400336943 its reverse (349633004), we get a palindrome (749969947).

The spelling of 400336943 in words is "four hundred million, three hundred thirty-six thousand, nine hundred forty-three".