2198549 has 4 divisors (see below), whose sum is σ = 2206764. Its totient is φ = 2190336.

The previous prime is 2198533. The next prime is 2198569. The reversal of 2198549 is 9458912.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1464100 + 734449 = 1210^2 + 857^2 .

It is a cyclic number.

It is not a de Polignac number, because 2198549 - 2⁴ = 2198533 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 (2198569) 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, 3692 + ... + 4245.

It is an arithmetic number, because the mean of its divisors is an integer number (551691).

2^2198549 is an apocalyptic number.

It is an amenable number.

2198549 is a deficient number, since it is larger than the sum of its proper divisors (8215).

2198549 is an equidigital number, since it uses as much as digits as its factorization.

2198549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8214.

The product of its digits is 25920, while the sum is 38.

The square root of 2198549 is about 1482.7504847411. The cubic root of 2198549 is about 130.0305450907.

The spelling of 2198549 in words is "two million, one hundred ninety-eight thousand, five hundred forty-nine".