860986109 has 2 divisors, whose sum is σ = 860986110. Its totient is φ = 860986108.

The previous prime is 860986079. The next prime is 860986111. The reversal of 860986109 is 901689068.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 840826009 + 20160100 = 28997^2 + 4490^2 .

It is a cyclic number.

It is not a de Polignac number, because 860986109 - 2¹² = 860982013 is a prime.

Together with 860986111, 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 (860986409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430493054 + 430493055.

It is an arithmetic number, because the mean of its divisors is an integer number (430493055).

Almost surely, 2^860986109 is an apocalyptic number.

It is an amenable number.

860986109 is a deficient number, since it is larger than the sum of its proper divisors (1).

860986109 is an equidigital number, since it uses as much as digits as its factorization.

860986109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 860986109 is about 29342.5647992809. The cubic root of 860986109 is about 951.3318748105.

The spelling of 860986109 in words is "eight hundred sixty million, nine hundred eighty-six thousand, one hundred nine".