2198723 has 2 divisors, whose sum is σ = 2198724. Its totient is φ = 2198722.

The previous prime is 2198701. The next prime is 2198747. The reversal of 2198723 is 3278912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2198723 - 2⁶ = 2198659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2198723.

It is not a weakly prime, because it can be changed into another prime (2198783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1099361 + 1099362.

It is an arithmetic number, because the mean of its divisors is an integer number (1099362).

2^2198723 is an apocalyptic number.

2198723 is a deficient number, since it is larger than the sum of its proper divisors (1).

2198723 is an equidigital number, since it uses as much as digits as its factorization.

2198723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 32.

The square root of 2198723 is about 1482.8091583208. The cubic root of 2198723 is about 130.0339753407.

The spelling of 2198723 in words is "two million, one hundred ninety-eight thousand, seven hundred twenty-three".