2090605309 has 8 divisors (see below), whose sum is σ = 2349309312. Its totient is φ = 1845885360.

The previous prime is 2090605303. The next prime is 2090605327. The reversal of 2090605309 is 9035060902.

It is a happy number.

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 2090605309 - 2³ = 2090605301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2090605301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3495697 + ... + 3496294.

It is an arithmetic number, because the mean of its divisors is an integer number (293663664).

Almost surely, 2^2090605309 is an apocalyptic number.

It is an amenable number.

2090605309 is a deficient number, since it is larger than the sum of its proper divisors (258704003).

2090605309 is a wasteful number, since it uses less digits than its factorization.

2090605309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6992027.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 2090605309 is about 45723.1375673192. The cubic root of 2090605309 is about 1278.6666839356. Note that the first 4 decimals are identical.

It can be divided in two parts, 209060 and 5309, that added together give a square (214369 = 463²).

The spelling of 2090605309 in words is "two billion, ninety million, six hundred five thousand, three hundred nine".