406821743 has 2 divisors, whose sum is σ = 406821744. Its totient is φ = 406821742.

The previous prime is 406821733. The next prime is 406821817. The reversal of 406821743 is 347128604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406821743 - 2¹⁸ = 406559599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406821733) 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, 203410871 + 203410872.

It is an arithmetic number, because the mean of its divisors is an integer number (203410872).

Almost surely, 2^406821743 is an apocalyptic number.

406821743 is a deficient number, since it is larger than the sum of its proper divisors (1).

406821743 is an equidigital number, since it uses as much as digits as its factorization.

406821743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 406821743 is about 20169.8225822638. The cubic root of 406821743 is about 740.9712975977.

The spelling of 406821743 in words is "four hundred six million, eight hundred twenty-one thousand, seven hundred forty-three".