42775643 has 2 divisors, whose sum is σ = 42775644. Its totient is φ = 42775642.

The previous prime is 42775619. The next prime is 42775661. The reversal of 42775643 is 34657724.

42775643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42775643 - 2⁸ = 42775387 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 42775597 and 42775606.

It is not a weakly prime, because it can be changed into another prime (42775613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21387821 + 21387822.

It is an arithmetic number, because the mean of its divisors is an integer number (21387822).

Almost surely, 2^42775643 is an apocalyptic number.

42775643 is a deficient number, since it is larger than the sum of its proper divisors (1).

42775643 is an equidigital number, since it uses as much as digits as its factorization.

42775643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 38.

The square root of 42775643 is about 6540.3090905553. The cubic root of 42775643 is about 349.7294317068.

The spelling of 42775643 in words is "forty-two million, seven hundred seventy-five thousand, six hundred forty-three".