2031609 has 8 divisors (see below), whose sum is σ = 2734560. Its totient is φ = 1341536.

The previous prime is 2031599. The next prime is 2031611. The reversal of 2031609 is 9061302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2031609 - 2⁴ = 2031593 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2031409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2844 + ... + 3485.

It is an arithmetic number, because the mean of its divisors is an integer number (341820).

2^2031609 is an apocalyptic number.

It is an amenable number.

2031609 is a deficient number, since it is larger than the sum of its proper divisors (702951).

2031609 is a wasteful number, since it uses less digits than its factorization.

2031609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6439.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 2031609 is about 1425.3452213411. The cubic root of 2031609 is about 126.6523860478.

The spelling of 2031609 in words is "two million, thirty-one thousand, six hundred nine".