2193309 has 6 divisors (see below), whose sum is σ = 3168126. Its totient is φ = 1462200.

The previous prime is 2193271. The next prime is 2193311. The reversal of 2193309 is 9033912.

It can be written as a sum of positive squares in only one way, i.e., 1988100 + 205209 = 1410^2 + 453^2 .

It is not a de Polignac number, because 2193309 - 2⁷ = 2193181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2193319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121842 + ... + 121859.

It is an arithmetic number, because the mean of its divisors is an integer number (528021).

2^2193309 is an apocalyptic number.

It is an amenable number.

2193309 is a deficient number, since it is larger than the sum of its proper divisors (974817).

2193309 is a wasteful number, since it uses less digits than its factorization.

2193309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243707 (or 243704 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 2193309 is about 1480.9824441903. The cubic root of 2193309 is about 129.9271584041.

The spelling of 2193309 in words is "two million, one hundred ninety-three thousand, three hundred nine".