1098919 has 4 divisors (see below), whose sum is σ = 1134400. Its totient is φ = 1063440.

The previous prime is 1098847. The next prime is 1098953. The reversal of 1098919 is 9198901.

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 1098919 - 2⁷ = 1098791 is a prime.

It is a super-2 number, since 2×1098919² = 2415245937122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1098989) 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, 17694 + ... + 17755.

It is an arithmetic number, because the mean of its divisors is an integer number (283600).

2^1098919 is an apocalyptic number.

1098919 is a deficient number, since it is larger than the sum of its proper divisors (35481).

1098919 is an equidigital number, since it uses as much as digits as its factorization.

1098919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35480.

The product of its (nonzero) digits is 5832, while the sum is 37.

The square root of 1098919 is about 1048.2933749671. The cubic root of 1098919 is about 103.1941854685.

The spelling of 1098919 in words is "one million, ninety-eight thousand, nine hundred nineteen".