65830813 has 4 divisors (see below), whose sum is σ = 65850300. Its totient is φ = 65811328.

The previous prime is 65830811. The next prime is 65830819. The reversal of 65830813 is 31803856.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16297369 + 49533444 = 4037^2 + 7038^2 .

It is a cyclic number.

It is not a de Polignac number, because 65830813 - 2¹ = 65830811 is a prime.

It is a super-3 number, since 3×65830813³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65830811) 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 3 ways as a sum of consecutive naturals, for example, 3220 + ... + 11917.

It is an arithmetic number, because the mean of its divisors is an integer number (16462575).

Almost surely, 2^65830813 is an apocalyptic number.

It is an amenable number.

65830813 is a deficient number, since it is larger than the sum of its proper divisors (19487).

65830813 is a wasteful number, since it uses less digits than its factorization.

65830813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19486.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 65830813 is about 8113.6189829200. The cubic root of 65830813 is about 403.7783907803.

The spelling of 65830813 in words is "sixty-five million, eight hundred thirty thousand, eight hundred thirteen".