42717687 has 4 divisors (see below), whose sum is σ = 56956920. Its totient is φ = 28478456.

The previous prime is 42717683. The next prime is 42717691. The reversal of 42717687 is 78671724.

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

It is an interprime number because it is at equal distance from previous prime (42717683) and next prime (42717691).

It is a cyclic number.

It is not a de Polignac number, because 42717687 - 2² = 42717683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42717683) 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, 7119612 + ... + 7119617.

It is an arithmetic number, because the mean of its divisors is an integer number (14239230).

Almost surely, 2^42717687 is an apocalyptic number.

42717687 is a deficient number, since it is larger than the sum of its proper divisors (14239233).

42717687 is a wasteful number, since it uses less digits than its factorization.

42717687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14239232.

The product of its digits is 131712, while the sum is 42.

The square root of 42717687 is about 6535.8769113257. The cubic root of 42717687 is about 349.5714128092.

The spelling of 42717687 in words is "forty-two million, seven hundred seventeen thousand, six hundred eighty-seven".