42543863 has 2 divisors, whose sum is σ = 42543864. Its totient is φ = 42543862.

The previous prime is 42543847. The next prime is 42543881. The reversal of 42543863 is 36834524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42543863 - 2⁴ = 42543847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42543803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21271931 + 21271932.

It is an arithmetic number, because the mean of its divisors is an integer number (21271932).

Almost surely, 2^42543863 is an apocalyptic number.

42543863 is a deficient number, since it is larger than the sum of its proper divisors (1).

42543863 is an equidigital number, since it uses as much as digits as its factorization.

42543863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 35.

The square root of 42543863 is about 6522.5656761738. The cubic root of 42543863 is about 349.0966172294.

The spelling of 42543863 in words is "forty-two million, five hundred forty-three thousand, eight hundred sixty-three".