3986557 has 4 divisors (see below), whose sum is σ = 3996000. Its totient is φ = 3977116.

The previous prime is 3986539. The next prime is 3986581. The reversal of 3986557 is 7556893.

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 a cyclic number.

It is not a de Polignac number, because 3986557 - 2¹⁹ = 3462269 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 (3986537) 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, 4057 + ... + 4942.

It is an arithmetic number, because the mean of its divisors is an integer number (999000).

Almost surely, 2^3986557 is an apocalyptic number.

It is an amenable number.

3986557 is a deficient number, since it is larger than the sum of its proper divisors (9443).

3986557 is an equidigital number, since it uses as much as digits as its factorization.

3986557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9442.

The product of its digits is 226800, while the sum is 43.

The square root of 3986557 is about 1996.6364215851. The cubic root of 3986557 is about 158.5620770087.

The spelling of 3986557 in words is "three million, nine hundred eighty-six thousand, five hundred fifty-seven".