2065813 has 4 divisors (see below), whose sum is σ = 2174560. Its totient is φ = 1957068.

The previous prime is 2065807. The next prime is 2065829. The reversal of 2065813 is 3185602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2065813 is a prime.

It is a Duffinian number.

2065813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2065213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54345 + ... + 54382.

It is an arithmetic number, because the mean of its divisors is an integer number (543640).

2^2065813 is an apocalyptic number.

It is an amenable number.

2065813 is a deficient number, since it is larger than the sum of its proper divisors (108747).

2065813 is a wasteful number, since it uses less digits than its factorization.

2065813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108746.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 2065813 is about 1437.2936373616. The cubic root of 2065813 is about 127.3592037991.

The spelling of 2065813 in words is "two million, sixty-five thousand, eight hundred thirteen".