3642689 has 4 divisors (see below), whose sum is σ = 3647424. Its totient is φ = 3637956.

The previous prime is 3642679. The next prime is 3642697. The reversal of 3642689 is 9862463.

3642689 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, 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 3642689 - 2⁴ = 3642673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3642619) 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, 917 + ... + 2850.

It is an arithmetic number, because the mean of its divisors is an integer number (911856).

Almost surely, 2^3642689 is an apocalyptic number.

It is an amenable number.

3642689 is a deficient number, since it is larger than the sum of its proper divisors (4735).

3642689 is an equidigital number, since it uses as much as digits as its factorization.

3642689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4734.

The product of its digits is 62208, while the sum is 38.

The square root of 3642689 is about 1908.5829822148. The cubic root of 3642689 is about 153.8653035970.

The spelling of 3642689 in words is "three million, six hundred forty-two thousand, six hundred eighty-nine".