424727987 has 4 divisors (see below), whose sum is σ = 425343336. Its totient is φ = 424112640.

The previous prime is 424727981. The next prime is 424728041. The reversal of 424727987 is 789727424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 424727987 - 2²⁰ = 423679411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (424727981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306638 + ... + 308019.

It is an arithmetic number, because the mean of its divisors is an integer number (106335834).

Almost surely, 2^424727987 is an apocalyptic number.

424727987 is a deficient number, since it is larger than the sum of its proper divisors (615349).

424727987 is an equidigital number, since it uses as much as digits as its factorization.

424727987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615348.

The product of its digits is 1580544, while the sum is 50.

The square root of 424727987 is about 20608.9297878371. The cubic root of 424727987 is about 751.6868621135.

The spelling of 424727987 in words is "four hundred twenty-four million, seven hundred twenty-seven thousand, nine hundred eighty-seven".