1116989 has 2 divisors, whose sum is σ = 1116990. Its totient is φ = 1116988.

The previous prime is 1116977. The next prime is 1117009. The reversal of 1116989 is 9896111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1092025 + 24964 = 1045^2 + 158^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1116989 is a prime.

It is a super-2 number, since 2×1116989² = 2495328852242, which contains 22 as substring.

It is a Chen prime.

It is equal to p₈₆₉₅₇ and since 1116989 and 86957 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1116289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 558494 + 558495.

It is an arithmetic number, because the mean of its divisors is an integer number (558495).

2^1116989 is an apocalyptic number.

It is an amenable number.

1116989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116989 is an equidigital number, since it uses as much as digits as its factorization.

1116989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 35.

The square root of 1116989 is about 1056.8770032506. The cubic root of 1116989 is about 103.7567354218.

The spelling of 1116989 in words is "one million, one hundred sixteen thousand, nine hundred eighty-nine".