2009493 has 6 divisors (see below), whose sum is σ = 2902614. Its totient is φ = 1339656.

The previous prime is 2009489. The next prime is 2009503. The reversal of 2009493 is 3949002.

It can be written as a sum of positive squares in only one way, i.e., 1855044 + 154449 = 1362^2 + 393^2 .

It is not a de Polignac number, because 2009493 - 2² = 2009489 is a prime.

2009493 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009093) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111630 + ... + 111647.

It is an arithmetic number, because the mean of its divisors is an integer number (483769).

2^2009493 is an apocalyptic number.

It is an amenable number.

2009493 is a deficient number, since it is larger than the sum of its proper divisors (893121).

2009493 is a wasteful number, since it uses less digits than its factorization.

2009493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223283 (or 223280 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 2009493 is about 1417.5658714853. The cubic root of 2009493 is about 126.1911309374.

The spelling of 2009493 in words is "two million, nine thousand, four hundred ninety-three".