8620109 has 2 divisors, whose sum is σ = 8620110. Its totient is φ = 8620108.

The previous prime is 8620069. The next prime is 8620111. The reversal of 8620109 is 9010268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6646084 + 1974025 = 2578^2 + 1405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8620109 is a prime.

It is a super-4 number, since 4×8620109⁴ (a number of 29 digits) contains 4444 as substring.

Together with 8620111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8620159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4310054 + 4310055.

It is an arithmetic number, because the mean of its divisors is an integer number (4310055).

Almost surely, 2^8620109 is an apocalyptic number.

It is an amenable number.

8620109 is a deficient number, since it is larger than the sum of its proper divisors (1).

8620109 is an equidigital number, since it uses as much as digits as its factorization.

8620109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 8620109 is about 2936.0022138956. The cubic root of 8620109 is about 205.0395244037.

The spelling of 8620109 in words is "eight million, six hundred twenty thousand, one hundred nine".