3220687 has 4 divisors (see below), whose sum is σ = 3264880. Its totient is φ = 3176496.

The previous prime is 3220681. The next prime is 3220699. The reversal of 3220687 is 7860223.

3220687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3220687 - 2¹¹ = 3218639 is a prime.

It is a Duffinian number.

3220687 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220681) 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 3 ways as a sum of consecutive naturals, for example, 21987 + ... + 22132.

It is an arithmetic number, because the mean of its divisors is an integer number (816220).

Almost surely, 2^3220687 is an apocalyptic number.

3220687 is a deficient number, since it is larger than the sum of its proper divisors (44193).

3220687 is an equidigital number, since it uses as much as digits as its factorization.

3220687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44192.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 3220687 is about 1794.6272593494. The cubic root of 3220687 is about 147.6781262745.

The spelling of 3220687 in words is "three million, two hundred twenty thousand, six hundred eighty-seven".