1098879 has 4 divisors (see below), whose sum is σ = 1465176. Its totient is φ = 732584.

The previous prime is 1098847. The next prime is 1098953. The reversal of 1098879 is 9788901.

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

It is a cyclic number.

It is not a de Polignac number, because 1098879 - 2⁵ = 1098847 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1098879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098379) 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, 183144 + ... + 183149.

It is an arithmetic number, because the mean of its divisors is an integer number (366294).

2^1098879 is an apocalyptic number.

1098879 is a deficient number, since it is larger than the sum of its proper divisors (366297).

1098879 is an equidigital number, since it uses as much as digits as its factorization.

1098879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366296.

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

The square root of 1098879 is about 1048.2742961649. The cubic root of 1098879 is about 103.1929333843.

It can be divided in two parts, 10 and 98879, that added together give a palindrome (98889).

The spelling of 1098879 in words is "one million, ninety-eight thousand, eight hundred seventy-nine".