2687687 has 4 divisors (see below), whose sum is σ = 2691240. Its totient is φ = 2684136.

The previous prime is 2687677. The next prime is 2687723. The reversal of 2687687 is 7867862.

It is a happy number.

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 2687687 - 2¹² = 2683591 is a prime.

It is a super-2 number, since 2×2687687² = 14447322819938, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2687647) 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, 137 + ... + 2322.

It is an arithmetic number, because the mean of its divisors is an integer number (672810).

2^2687687 is an apocalyptic number.

2687687 is a deficient number, since it is larger than the sum of its proper divisors (3553).

2687687 is a wasteful number, since it uses less digits than its factorization.

2687687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3552.

The product of its digits is 225792, while the sum is 44.

The square root of 2687687 is about 1639.4166645487. The cubic root of 2687687 is about 139.0356687787.

The spelling of 2687687 in words is "two million, six hundred eighty-seven thousand, six hundred eighty-seven".