3721667 has 4 divisors (see below), whose sum is σ = 3727800. Its totient is φ = 3715536.

The previous prime is 3721631. The next prime is 3721673. The reversal of 3721667 is 7661273.

3721667 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 3721667 - 2⁶ = 3721603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3720667) 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, 2042 + ... + 3407.

It is an arithmetic number, because the mean of its divisors is an integer number (931950).

Almost surely, 2^3721667 is an apocalyptic number.

3721667 is a deficient number, since it is larger than the sum of its proper divisors (6133).

3721667 is an equidigital number, since it uses as much as digits as its factorization.

3721667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6132.

The product of its digits is 10584, while the sum is 32.

The square root of 3721667 is about 1929.1622534147. The cubic root of 3721667 is about 154.9693591878.

The spelling of 3721667 in words is "three million, seven hundred twenty-one thousand, six hundred sixty-seven".