1098939 has 4 divisors (see below), whose sum is σ = 1465256. Its totient is φ = 732624.

The previous prime is 1098847. The next prime is 1098953. The reversal of 1098939 is 9398901.

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

It is not a de Polignac number, because 1098939 - 2¹² = 1094843 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1098897 and 1098906.

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, 183154 + ... + 183159.

It is an arithmetic number, because the mean of its divisors is an integer number (366314).

2^1098939 is an apocalyptic number.

1098939 is a deficient number, since it is larger than the sum of its proper divisors (366317).

1098939 is an equidigital number, since it uses as much as digits as its factorization.

1098939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366316.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 1098939 is about 1048.3029142381. The cubic root of 1098939 is about 103.1948114993.

The spelling of 1098939 in words is "one million, ninety-eight thousand, nine hundred thirty-nine".