400530343 has 2 divisors, whose sum is σ = 400530344. Its totient is φ = 400530342.

The previous prime is 400530329. The next prime is 400530359. The reversal of 400530343 is 343035004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400530343 - 2⁵ = 400530311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400530373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200265171 + 200265172.

It is an arithmetic number, because the mean of its divisors is an integer number (200265172).

Almost surely, 2^400530343 is an apocalyptic number.

400530343 is a deficient number, since it is larger than the sum of its proper divisors (1).

400530343 is an equidigital number, since it uses as much as digits as its factorization.

400530343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 22.

The square root of 400530343 is about 20013.2541831657. The cubic root of 400530343 is about 737.1317893057.

Adding to 400530343 its reverse (343035004), we get a palindrome (743565347).

The spelling of 400530343 in words is "four hundred million, five hundred thirty thousand, three hundred forty-three".