42663859 has 6 divisors (see below), whose sum is σ = 49629444. Its totient is φ = 36568980.

The previous prime is 42663857. The next prime is 42663877. The reversal of 42663859 is 95836624.

It is not a de Polignac number, because 42663859 - 2¹ = 42663857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42663851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 435297 + ... + 435394.

It is an arithmetic number, because the mean of its divisors is an integer number (8271574).

Almost surely, 2^42663859 is an apocalyptic number.

42663859 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

42663859 is a deficient number, since it is larger than the sum of its proper divisors (6965585).

42663859 is an equidigital number, since it uses as much as digits as its factorization.

42663859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870705 (or 870698 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 42663859 is about 6531.7577266766. The cubic root of 42663859 is about 349.4245209678.

The spelling of 42663859 in words is "forty-two million, six hundred sixty-three thousand, eight hundred fifty-nine".