1986117 has 24 divisors (see below), whose sum is σ = 3146400. Its totient is φ = 1110816.

The previous prime is 1986109. The next prime is 1986121. The reversal of 1986117 is 7116891.

It is not a de Polignac number, because 1986117 - 2³ = 1986109 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986137) 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 in 23 ways as a sum of consecutive naturals, for example, 8559 + ... + 8787.

It is an arithmetic number, because the mean of its divisors is an integer number (131100).

2^1986117 is an apocalyptic number.

It is an amenable number.

1986117 is a deficient number, since it is larger than the sum of its proper divisors (1160283).

1986117 is a wasteful number, since it uses less digits than its factorization.

1986117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 298 counting only the distinct ones).

The product of its digits is 3024, while the sum is 33.

The square root of 1986117 is about 1409.2966330762. The cubic root of 1986117 is about 125.6999031042.

The spelling of 1986117 in words is "one million, nine hundred eighty-six thousand, one hundred seventeen".