427009999 has 4 divisors (see below), whose sum is σ = 459856936. Its totient is φ = 394163064.

The previous prime is 427009981. The next prime is 427010041. The reversal of 427009999 is 999900724.

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 427009999 - 2⁷ = 427009871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427009939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16423449 + ... + 16423474.

It is an arithmetic number, because the mean of its divisors is an integer number (114964234).

Almost surely, 2^427009999 is an apocalyptic number.

427009999 is a deficient number, since it is larger than the sum of its proper divisors (32846937).

427009999 is a wasteful number, since it uses less digits than its factorization.

427009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32846936.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 427009999 is about 20664.2202611180. The cubic root of 427009999 is about 753.0306990254.

The spelling of 427009999 in words is "four hundred twenty-seven million, nine thousand, nine hundred ninety-nine".