405532643 has 2 divisors, whose sum is σ = 405532644. Its totient is φ = 405532642.

The previous prime is 405532609. The next prime is 405532661. The reversal of 405532643 is 346235504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405532643 - 2¹⁶ = 405467107 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (405532243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202766321 + 202766322.

It is an arithmetic number, because the mean of its divisors is an integer number (202766322).

Almost surely, 2^405532643 is an apocalyptic number.

405532643 is a deficient number, since it is larger than the sum of its proper divisors (1).

405532643 is an equidigital number, since it uses as much as digits as its factorization.

405532643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 405532643 is about 20137.8410709788. The cubic root of 405532643 is about 740.1878285079.

The spelling of 405532643 in words is "four hundred five million, five hundred thirty-two thousand, six hundred forty-three".