40017 has 4 divisors (see below), whose sum is σ = 53360. Its totient is φ = 26676.

The previous prime is 40013. The next prime is 40031. The reversal of 40017 is 71004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40017 - 2² = 40013 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 7 and base 15.

It is a junction number, because it is equal to n+sod(n) for n = 39984 and 40011.

It is not an unprimeable number, because it can be changed into a prime (40013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6667 + ... + 6672.

It is an arithmetic number, because the mean of its divisors is an integer number (13340).

2⁴⁰⁰¹⁷ is an apocalyptic number.

It is an amenable number.

40017 is a deficient number, since it is larger than the sum of its proper divisors (13343).

40017 is a wasteful number, since it uses less digits than its factorization.

40017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13342.

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 40017 is about 200.0424954853. The cubic root of 40017 is about 34.2043631792.

The spelling of 40017 in words is "forty thousand, seventeen", and thus it is an iban number.