1898243 has 2 divisors, whose sum is σ = 1898244. Its totient is φ = 1898242.

The previous prime is 1898227. The next prime is 1898249. The reversal of 1898243 is 3428981.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (3428981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1898243 - 2⁴ = 1898227 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1898249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 949121 + 949122.

It is an arithmetic number, because the mean of its divisors is an integer number (949122).

2^1898243 is an apocalyptic number.

1898243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1898243 is an equidigital number, since it uses as much as digits as its factorization.

1898243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The square root of 1898243 is about 1377.7673969143. The cubic root of 1898243 is about 123.8180430481.

The spelling of 1898243 in words is "one million, eight hundred ninety-eight thousand, two hundred forty-three".