3998517 has 8 divisors (see below), whose sum is σ = 5345760. Its totient is φ = 2658480.

The previous prime is 3998497. The next prime is 3998521. The reversal of 3998517 is 7158993.

It is a happy number.

3998517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3998517 - 2⁸ = 3998261 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334 + ... + 2847.

It is an arithmetic number, because the mean of its divisors is an integer number (668220).

Almost surely, 2^3998517 is an apocalyptic number.

It is an amenable number.

3998517 is a deficient number, since it is larger than the sum of its proper divisors (1347243).

3998517 is a wasteful number, since it uses less digits than its factorization.

3998517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3603.

The product of its digits is 68040, while the sum is 42.

The square root of 3998517 is about 1999.6292156297. The cubic root of 3998517 is about 158.7204851406.

The spelling of 3998517 in words is "three million, nine hundred ninety-eight thousand, five hundred seventeen".