4000687 has 4 divisors (see below), whose sum is σ = 4085856. Its totient is φ = 3915520.

The previous prime is 4000679. The next prime is 4000691. The reversal of 4000687 is 7860004.

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 4000687 - 2³ = 4000679 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 (4000987) 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, 42514 + ... + 42607.

It is an arithmetic number, because the mean of its divisors is an integer number (1021464).

Almost surely, 2^4000687 is an apocalyptic number.

4000687 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

4000687 is a deficient number, since it is larger than the sum of its proper divisors (85169).

4000687 is an equidigital number, since it uses as much as digits as its factorization.

4000687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85168.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 4000687 is about 2000.1717426261. The cubic root of 4000687 is about 158.7491925476.

The spelling of 4000687 in words is "four million, six hundred eighty-seven", and thus it is an aban number.