1078989 has 4 divisors (see below), whose sum is σ = 1438656. Its totient is φ = 719324.

The previous prime is 1078981. The next prime is 1078993. The reversal of 1078989 is 9898701.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1078989 - 2³ = 1078981 is a prime.

It is a D-number.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 1078989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1078981) 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 3 ways as a sum of consecutive naturals, for example, 179829 + ... + 179834.

It is an arithmetic number, because the mean of its divisors is an integer number (359664).

2^1078989 is an apocalyptic number.

It is an amenable number.

1078989 is a deficient number, since it is larger than the sum of its proper divisors (359667).

1078989 is an equidigital number, since it uses as much as digits as its factorization.

1078989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359666.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 1078989 is about 1038.7439530510. The cubic root of 1078989 is about 102.5665322560.

It can be divided in two parts, 10789 and 89, that added together give a triangular number (10878 = T₁₄₇).

The spelling of 1078989 in words is "one million, seventy-eight thousand, nine hundred eighty-nine".