4017987 has 12 divisors (see below), whose sum is σ = 6109480. Its totient is φ = 2537568.

The previous prime is 4017977. The next prime is 4017989. The reversal of 4017987 is 7897104.

It is not a de Polignac number, because 4017987 - 2⁸ = 4017731 is a prime.

It is a super-2 number, since 2×4017987² = 32288439064338, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4017989) 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 11 ways as a sum of consecutive naturals, for example, 11578 + ... + 11919.

Almost surely, 2^4017987 is an apocalyptic number.

4017987 is a deficient number, since it is larger than the sum of its proper divisors (2091493).

4017987 is a wasteful number, since it uses less digits than its factorization.

4017987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23522 (or 23519 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 4017987 is about 2004.4917061440. The cubic root of 4017987 is about 158.9776876250.

The spelling of 4017987 in words is "four million, seventeen thousand, nine hundred eighty-seven".