1986167 has 2 divisors, whose sum is σ = 1986168. Its totient is φ = 1986166.

The previous prime is 1986137. The next prime is 1986169. The reversal of 1986167 is 7616891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1986167 - 2¹⁶ = 1920631 is a prime.

Together with 1986169, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1986167.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1986169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993083 + 993084.

It is an arithmetic number, because the mean of its divisors is an integer number (993084).

2^1986167 is an apocalyptic number.

1986167 is a deficient number, since it is larger than the sum of its proper divisors (1).

1986167 is an equidigital number, since it uses as much as digits as its factorization.

1986167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 1986167 is about 1409.3143723102. The cubic root of 1986167 is about 125.7009579166.

The spelling of 1986167 in words is "one million, nine hundred eighty-six thousand, one hundred sixty-seven".