1098659 has 4 divisors (see below), whose sum is σ = 1163304. Its totient is φ = 1034016.

The previous prime is 1098649. The next prime is 1098667. The reversal of 1098659 is 9568901.

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-1098659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1098649) 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, 32297 + ... + 32330.

It is an arithmetic number, because the mean of its divisors is an integer number (290826).

2^1098659 is an apocalyptic number.

1098659 is a deficient number, since it is larger than the sum of its proper divisors (64645).

1098659 is an equidigital number, since it uses as much as digits as its factorization.

1098659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64644.

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

The square root of 1098659 is about 1048.1693565450. The cubic root of 1098659 is about 103.1860463777.

The spelling of 1098659 in words is "one million, ninety-eight thousand, six hundred fifty-nine".