2198649 has 8 divisors (see below), whose sum is σ = 2968960. Its totient is φ = 1447056.

The previous prime is 2198617. The next prime is 2198653. The reversal of 2198649 is 9468912.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2198649 - 2⁵ = 2198617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2198659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4402 + ... + 4875.

It is an arithmetic number, because the mean of its divisors is an integer number (371120).

2^2198649 is an apocalyptic number.

It is an amenable number.

2198649 is a deficient number, since it is larger than the sum of its proper divisors (770311).

2198649 is an equidigital number, since it uses as much as digits as its factorization.

2198649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9359.

The product of its digits is 31104, while the sum is 39.

The square root of 2198649 is about 1482.7842054729. The cubic root of 2198649 is about 130.0325165209.

The spelling of 2198649 in words is "two million, one hundred ninety-eight thousand, six hundred forty-nine".