427667687 has 4 divisors (see below), whose sum is σ = 427709760. Its totient is φ = 427625616.

The previous prime is 427667683. The next prime is 427667689. The reversal of 427667687 is 786766724.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 427667687 - 2² = 427667683 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 (427667683) 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, 4739 + ... + 29627.

It is an arithmetic number, because the mean of its divisors is an integer number (106927440).

Almost surely, 2^427667687 is an apocalyptic number.

427667687 is a deficient number, since it is larger than the sum of its proper divisors (42073).

427667687 is a wasteful number, since it uses less digits than its factorization.

427667687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42072.

The product of its digits is 4741632, while the sum is 53.

The square root of 427667687 is about 20680.1278284250. The cubic root of 427667687 is about 753.4171109002.

The spelling of 427667687 in words is "four hundred twenty-seven million, six hundred sixty-seven thousand, six hundred eighty-seven".