427988523 has 4 divisors (see below), whose sum is σ = 570651368. Its totient is φ = 285325680.

The previous prime is 427988521. The next prime is 427988543. The reversal of 427988523 is 325889724.

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

It is not a de Polignac number, because 427988523 - 2¹ = 427988521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (427988521) 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 3 ways as a sum of consecutive naturals, for example, 71331418 + ... + 71331423.

It is an arithmetic number, because the mean of its divisors is an integer number (142662842).

Almost surely, 2^427988523 is an apocalyptic number.

427988523 is a deficient number, since it is larger than the sum of its proper divisors (142662845).

427988523 is a wasteful number, since it uses less digits than its factorization.

427988523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142662844.

The product of its digits is 967680, while the sum is 48.

The square root of 427988523 is about 20687.8834828505. The cubic root of 427988523 is about 753.6054681363.

The spelling of 427988523 in words is "four hundred twenty-seven million, nine hundred eighty-eight thousand, five hundred twenty-three".