8427109 has 2 divisors, whose sum is σ = 8427110. Its totient is φ = 8427108.

The previous prime is 8427103. The next prime is 8427113. The reversal of 8427109 is 9017248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5654884 + 2772225 = 2378^2 + 1665^2 .

It is a cyclic number.

It is not a de Polignac number, because 8427109 - 2⁵ = 8427077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8427103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4213554 + 4213555.

It is an arithmetic number, because the mean of its divisors is an integer number (4213555).

Almost surely, 2^8427109 is an apocalyptic number.

It is an amenable number.

8427109 is a deficient number, since it is larger than the sum of its proper divisors (1).

8427109 is an equidigital number, since it uses as much as digits as its factorization.

8427109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 8427109 is about 2902.9483288546. The cubic root of 8427109 is about 203.4977150224.

The spelling of 8427109 in words is "eight million, four hundred twenty-seven thousand, one hundred nine".