42667687 has 4 divisors (see below), whose sum is σ = 44044096. Its totient is φ = 41291280.

The previous prime is 42667661. The next prime is 42667699. The reversal of 42667687 is 78676624.

42667687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42667687 - 2¹⁵ = 42634919 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 (42667607) 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, 688158 + ... + 688219.

It is an arithmetic number, because the mean of its divisors is an integer number (11011024).

Almost surely, 2^42667687 is an apocalyptic number.

42667687 is a deficient number, since it is larger than the sum of its proper divisors (1376409).

42667687 is a wasteful number, since it uses less digits than its factorization.

42667687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376408.

The product of its digits is 677376, while the sum is 46.

The square root of 42667687 is about 6532.0507499559. The cubic root of 42667687 is about 349.4349713200.

The spelling of 42667687 in words is "forty-two million, six hundred sixty-seven thousand, six hundred eighty-seven".