1098589 has 4 divisors (see below), whose sum is σ = 1102240. Its totient is φ = 1094940.

The previous prime is 1098541. The next prime is 1098593. The reversal of 1098589 is 9858901.

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 1098589 - 2⁹ = 1098077 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098509) 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, 1329 + ... + 1990.

It is an arithmetic number, because the mean of its divisors is an integer number (275560).

2^1098589 is an apocalyptic number.

It is an amenable number.

1098589 is a deficient number, since it is larger than the sum of its proper divisors (3651).

1098589 is an equidigital number, since it uses as much as digits as its factorization.

1098589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3650.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 1098589 is about 1048.1359644626. The cubic root of 1098589 is about 103.1838548647.

The spelling of 1098589 in words is "one million, ninety-eight thousand, five hundred eighty-nine".