42118663 has 2 divisors, whose sum is σ = 42118664. Its totient is φ = 42118662.

The previous prime is 42118631. The next prime is 42118693. The reversal of 42118663 is 36681124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42118663 - 2⁵ = 42118631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42118693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21059331 + 21059332.

It is an arithmetic number, because the mean of its divisors is an integer number (21059332).

Almost surely, 2^42118663 is an apocalyptic number.

42118663 is a deficient number, since it is larger than the sum of its proper divisors (1).

42118663 is an equidigital number, since it uses as much as digits as its factorization.

42118663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 42118663 is about 6489.8892902730. The cubic root of 42118663 is about 347.9297183784.

Adding to 42118663 its reverse (36681124), we get a palindrome (78799787).

The spelling of 42118663 in words is "forty-two million, one hundred eighteen thousand, six hundred sixty-three".