1098979 has 8 divisors (see below), whose sum is σ = 1322240. Its totient is φ = 892296.

The previous prime is 1098973. The next prime is 1098989. The reversal of 1098979 is 9798901.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1098979 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3999 + ... + 4264.

It is an arithmetic number, because the mean of its divisors is an integer number (165280).

2^1098979 is an apocalyptic number.

1098979 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1098979 is a deficient number, since it is larger than the sum of its proper divisors (223261).

1098979 is an equidigital number, since it uses as much as digits as its factorization.

1098979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8289.

The product of its (nonzero) digits is 40824, while the sum is 43.

The square root of 1098979 is about 1048.3219925195. The cubic root of 1098979 is about 103.1960635379.

It can be divided in two parts, 10 and 98979, that added together give a palindrome (98989).

The spelling of 1098979 in words is "one million, ninety-eight thousand, nine hundred seventy-nine".