42547663 has 2 divisors, whose sum is σ = 42547664. Its totient is φ = 42547662.

The previous prime is 42547639. The next prime is 42547693. The reversal of 42547663 is 36674524.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42547663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42547693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21273831 + 21273832.

It is an arithmetic number, because the mean of its divisors is an integer number (21273832).

Almost surely, 2^42547663 is an apocalyptic number.

42547663 is a deficient number, since it is larger than the sum of its proper divisors (1).

42547663 is an equidigital number, since it uses as much as digits as its factorization.

42547663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 37.

The square root of 42547663 is about 6522.8569660847. The cubic root of 42547663 is about 349.1070106411.

The spelling of 42547663 in words is "forty-two million, five hundred forty-seven thousand, six hundred sixty-three".