1186989 has 8 divisors (see below), whose sum is σ = 1599360. Its totient is φ = 782976.

The previous prime is 1186981. The next prime is 1187003. The reversal of 1186989 is 9896811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1186989 - 2³ = 1186981 is a prime.

It is a super-2 number, since 2×1186989² = 2817885772242, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1186989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1186981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1749 + ... + 2330.

It is an arithmetic number, because the mean of its divisors is an integer number (199920).

2^1186989 is an apocalyptic number.

It is an amenable number.

1186989 is a deficient number, since it is larger than the sum of its proper divisors (412371).

1186989 is an equidigital number, since it uses as much as digits as its factorization.

1186989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4179.

The product of its digits is 31104, while the sum is 42.

The square root of 1186989 is about 1089.4902477765. The cubic root of 1186989 is about 105.8803979123.

The spelling of 1186989 in words is "one million, one hundred eighty-six thousand, nine hundred eighty-nine".