1086989 has 2 divisors, whose sum is σ = 1086990. Its totient is φ = 1086988.

The previous prime is 1086937. The next prime is 1086991. The reversal of 1086989 is 9896801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1085764 + 1225 = 1042^2 + 35^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1086989 is a prime.

It is a super-2 number, since 2×1086989² = 2363090172242, which contains 22 as substring.

Together with 1086991, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1086919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 543494 + 543495.

It is an arithmetic number, because the mean of its divisors is an integer number (543495).

2^1086989 is an apocalyptic number.

It is an amenable number.

1086989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1086989 is an equidigital number, since it uses as much as digits as its factorization.

1086989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 1086989 is about 1042.5876461958. The cubic root of 1086989 is about 102.8193963310.

The spelling of 1086989 in words is "one million, eighty-six thousand, nine hundred eighty-nine".