400423313 has 2 divisors, whose sum is σ = 400423314. Its totient is φ = 400423312.

The previous prime is 400423301. The next prime is 400423357. The reversal of 400423313 is 313324004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201838849 + 198584464 = 14207^2 + 14092^2 .

It is a cyclic number.

It is not a de Polignac number, because 400423313 - 2²⁸ = 131987857 is a prime.

It is not a weakly prime, because it can be changed into another prime (400423393) 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, 200211656 + 200211657.

It is an arithmetic number, because the mean of its divisors is an integer number (200211657).

Almost surely, 2^400423313 is an apocalyptic number.

It is an amenable number.

400423313 is a deficient number, since it is larger than the sum of its proper divisors (1).

400423313 is an equidigital number, since it uses as much as digits as its factorization.

400423313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 400423313 is about 20010.5800265759. The cubic root of 400423313 is about 737.0661244979.

Adding to 400423313 its reverse (313324004), we get a palindrome (713747317).

The spelling of 400423313 in words is "four hundred million, four hundred twenty-three thousand, three hundred thirteen".