423843987 has 8 divisors (see below), whose sum is σ = 645857536. Its totient is φ = 242196552.

The previous prime is 423843971. The next prime is 423843989. The reversal of 423843987 is 789348324.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 423843987 - 2⁴ = 423843971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423843989) 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 in 7 ways as a sum of consecutive naturals, for example, 10091503 + ... + 10091544.

It is an arithmetic number, because the mean of its divisors is an integer number (80732192).

Almost surely, 2^423843987 is an apocalyptic number.

423843987 is a deficient number, since it is larger than the sum of its proper divisors (222013549).

423843987 is a wasteful number, since it uses less digits than its factorization.

423843987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20183057.

The product of its digits is 1161216, while the sum is 48.

The square root of 423843987 is about 20587.4716028948. The cubic root of 423843987 is about 751.1649965515.

The spelling of 423843987 in words is "four hundred twenty-three million, eight hundred forty-three thousand, nine hundred eighty-seven".