2065590921 has 8 divisors (see below), whose sum is σ = 2812719744. Its totient is φ = 1347761360.

The previous prime is 2065590911. The next prime is 2065590929. The reversal of 2065590921 is 1290955602.

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 2065590921 - 2²³ = 2057202313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2065590921.

It is not an unprimeable number, because it can be changed into a prime (2065590929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7324650 + ... + 7324931.

It is an arithmetic number, because the mean of its divisors is an integer number (351589968).

Almost surely, 2^2065590921 is an apocalyptic number.

It is an amenable number.

2065590921 is a deficient number, since it is larger than the sum of its proper divisors (747128823).

2065590921 is a wasteful number, since it uses less digits than its factorization.

2065590921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14649631.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 2065590921 is about 45448.7724916746. The cubic root of 2065590921 is about 1273.5463984640.

The spelling of 2065590921 in words is "two billion, sixty-five million, five hundred ninety thousand, nine hundred twenty-one".