3986859 has 4 divisors (see below), whose sum is σ = 5315816. Its totient is φ = 2657904.

The previous prime is 3986839. The next prime is 3986897. The reversal of 3986859 is 9586893.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3986859 - 2¹² = 3982763 is a prime.

It is a super-3 number, since 3×3986859³ (a number of 21 digits) contains 333 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3986809) 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, 664474 + ... + 664479.

It is an arithmetic number, because the mean of its divisors is an integer number (1328954).

Almost surely, 2^3986859 is an apocalyptic number.

3986859 is a deficient number, since it is larger than the sum of its proper divisors (1328957).

3986859 is a wasteful number, since it uses less digits than its factorization.

3986859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328956.

The product of its digits is 466560, while the sum is 48.

The square root of 3986859 is about 1996.7120473418. The cubic root of 3986859 is about 158.5660808428.

The spelling of 3986859 in words is "three million, nine hundred eighty-six thousand, eight hundred fifty-nine".