445642643 has 2 divisors, whose sum is σ = 445642644. Its totient is φ = 445642642.

The previous prime is 445642633. The next prime is 445642699. The reversal of 445642643 is 346246544.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 445642643 - 2⁴ = 445642627 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 445642597 and 445642606.

It is not a weakly prime, because it can be changed into another prime (445642633) 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, 222821321 + 222821322.

It is an arithmetic number, because the mean of its divisors is an integer number (222821322).

Almost surely, 2^445642643 is an apocalyptic number.

445642643 is a deficient number, since it is larger than the sum of its proper divisors (1).

445642643 is an equidigital number, since it uses as much as digits as its factorization.

445642643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 38.

The square root of 445642643 is about 21110.2497142976. The cubic root of 445642643 is about 763.8280104751.

The spelling of 445642643 in words is "four hundred forty-five million, six hundred forty-two thousand, six hundred forty-three".