8631109 has 2 divisors, whose sum is σ = 8631110. Its totient is φ = 8631108.

The previous prime is 8631097. The next prime is 8631151. The reversal of 8631109 is 9011368.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8538084 + 93025 = 2922^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 8631109 - 2¹⁵ = 8598341 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8631199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4315554 + 4315555.

It is an arithmetic number, because the mean of its divisors is an integer number (4315555).

Almost surely, 2^8631109 is an apocalyptic number.

It is an amenable number.

8631109 is a deficient number, since it is larger than the sum of its proper divisors (1).

8631109 is an equidigital number, since it uses as much as digits as its factorization.

8631109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 8631109 is about 2937.8749122452. The cubic root of 8631109 is about 205.1267033505.

The spelling of 8631109 in words is "eight million, six hundred thirty-one thousand, one hundred nine".