8609813 has 2 divisors, whose sum is σ = 8609814. Its totient is φ = 8609812.

The previous prime is 8609791. The next prime is 8609819. The reversal of 8609813 is 3189068.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7524049 + 1085764 = 2743^2 + 1042^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8609813 is a prime.

It is equal to p₅₇₈₀₆₉ and since 8609813 and 578069 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8609819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4304906 + 4304907.

It is an arithmetic number, because the mean of its divisors is an integer number (4304907).

Almost surely, 2^8609813 is an apocalyptic number.

It is an amenable number.

8609813 is a deficient number, since it is larger than the sum of its proper divisors (1).

8609813 is an equidigital number, since it uses as much as digits as its factorization.

8609813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 8609813 is about 2934.2482853365. The cubic root of 8609813 is about 204.9578576867.

The spelling of 8609813 in words is "eight million, six hundred nine thousand, eight hundred thirteen".