1089659 has 4 divisors (see below), whose sum is σ = 1099416. Its totient is φ = 1079904.

The previous prime is 1089653. The next prime is 1089661. The reversal of 1089659 is 9569801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1089659 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1089653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4709 + ... + 4934.

It is an arithmetic number, because the mean of its divisors is an integer number (274854).

2^1089659 is an apocalyptic number.

1089659 is a deficient number, since it is larger than the sum of its proper divisors (9757).

1089659 is an equidigital number, since it uses as much as digits as its factorization.

1089659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9756.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 1089659 is about 1043.8673287348. The cubic root of 1089659 is about 102.9035135017.

The spelling of 1089659 in words is "one million, eighty-nine thousand, six hundred fifty-nine".