2198939 has 4 divisors (see below), whose sum is σ = 2205624. Its totient is φ = 2192256.

The previous prime is 2198909. The next prime is 2198981. The reversal of 2198939 is 9398912.

2198939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2198939 - 2¹⁶ = 2133403 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2198896 and 2198905.

It is not an unprimeable number, because it can be changed into a prime (2198909) 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, 2822 + ... + 3515.

It is an arithmetic number, because the mean of its divisors is an integer number (551406).

2^2198939 is an apocalyptic number.

2198939 is a deficient number, since it is larger than the sum of its proper divisors (6685).

2198939 is an equidigital number, since it uses as much as digits as its factorization.

2198939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6684.

The product of its digits is 34992, while the sum is 41.

The square root of 2198939 is about 1482.8819912589. The cubic root of 2198939 is about 130.0382333303.

The spelling of 2198939 in words is "two million, one hundred ninety-eight thousand, nine hundred thirty-nine".