427717687 has 4 divisors (see below), whose sum is σ = 429240096. Its totient is φ = 426195280.

The previous prime is 427717679. The next prime is 427717691. The reversal of 427717687 is 786717724.

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 427717687 - 2³ = 427717679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 427717687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427717657) 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, 760783 + ... + 761344.

It is an arithmetic number, because the mean of its divisors is an integer number (107310024).

Almost surely, 2^427717687 is an apocalyptic number.

427717687 is a deficient number, since it is larger than the sum of its proper divisors (1522409).

427717687 is a wasteful number, since it uses less digits than its factorization.

427717687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522408.

The product of its digits is 921984, while the sum is 49.

The square root of 427717687 is about 20681.3366831063. The cubic root of 427717687 is about 753.4464712257.

The spelling of 427717687 in words is "four hundred twenty-seven million, seven hundred seventeen thousand, six hundred eighty-seven".