1198839 has 4 divisors (see below), whose sum is σ = 1598456. Its totient is φ = 799224.

The previous prime is 1198819. The next prime is 1198849. The reversal of 1198839 is 9388911.

It is a happy number.

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

It is not a de Polignac number, because 1198839 - 2⁸ = 1198583 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 = 1198797 and 1198806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198819) 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, 199804 + ... + 199809.

It is an arithmetic number, because the mean of its divisors is an integer number (399614).

2^1198839 is an apocalyptic number.

1198839 is a deficient number, since it is larger than the sum of its proper divisors (399617).

1198839 is an equidigital number, since it uses as much as digits as its factorization.

1198839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399616.

The product of its digits is 15552, while the sum is 39.

The square root of 1198839 is about 1094.9150651991. The cubic root of 1198839 is about 106.2315751211.

The spelling of 1198839 in words is "one million, one hundred ninety-eight thousand, eight hundred thirty-nine".