18798943 has 2 divisors, whose sum is σ = 18798944. Its totient is φ = 18798942.

The previous prime is 18798929. The next prime is 18798971. The reversal of 18798943 is 34989781.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18798943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18798973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9399471 + 9399472.

It is an arithmetic number, because the mean of its divisors is an integer number (9399472).

Almost surely, 2^18798943 is an apocalyptic number.

18798943 is a deficient number, since it is larger than the sum of its proper divisors (1).

18798943 is an equidigital number, since it uses as much as digits as its factorization.

18798943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 49.

The square root of 18798943 is about 4335.7747865866. The cubic root of 18798943 is about 265.8955956749.

The spelling of 18798943 in words is "eighteen million, seven hundred ninety-eight thousand, nine hundred forty-three".