3996559 has 4 divisors (see below), whose sum is σ = 4567504. Its totient is φ = 3425616.

The previous prime is 3996541. The next prime is 3996569. The reversal of 3996559 is 9556993.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3996559 - 2⁵ = 3996527 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 (3996529) 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, 285462 + ... + 285475.

It is an arithmetic number, because the mean of its divisors is an integer number (1141876).

Almost surely, 2^3996559 is an apocalyptic number.

3996559 is a deficient number, since it is larger than the sum of its proper divisors (570945).

3996559 is an equidigital number, since it uses as much as digits as its factorization.

3996559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570944.

The product of its digits is 328050, while the sum is 46.

The square root of 3996559 is about 1999.1395649129. The cubic root of 3996559 is about 158.6945734129.

The spelling of 3996559 in words is "three million, nine hundred ninety-six thousand, five hundred fifty-nine".