423899987 has 8 divisors (see below), whose sum is σ = 484594176. Its totient is φ = 363240072.

The previous prime is 423899923. The next prime is 423899999. The reversal of 423899987 is 789998324.

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

It is a cyclic number.

It is not a de Polignac number, because 423899987 - 2⁶ = 423899923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423899087) 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, 28838 + ... + 40980.

It is an arithmetic number, because the mean of its divisors is an integer number (60574272).

Almost surely, 2^423899987 is an apocalyptic number.

423899987 is a deficient number, since it is larger than the sum of its proper divisors (60694189).

423899987 is a wasteful number, since it uses less digits than its factorization.

423899987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17137.

The product of its digits is 7838208, while the sum is 59.

The square root of 423899987 is about 20588.8316084230. The cubic root of 423899987 is about 751.1980774245.

The spelling of 423899987 in words is "four hundred twenty-three million, eight hundred ninety-nine thousand, nine hundred eighty-seven".