198013 has 2 divisors, whose sum is σ = 198014. Its totient is φ = 198012.

The previous prime is 197971. The next prime is 198017. The reversal of 198013 is 310891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196249 + 1764 = 443^2 + 42^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198013 is a prime.

198013 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99006 + 99007.

It is an arithmetic number, because the mean of its divisors is an integer number (99007).

2¹⁹⁸⁰¹³ is an apocalyptic number.

It is an amenable number.

198013 is a deficient number, since it is larger than the sum of its proper divisors (1).

198013 is an equidigital number, since it uses as much as digits as its factorization.

198013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 198013 is about 444.9865166497. The cubic root of 198013 is about 58.2860423971.

The spelling of 198013 in words is "one hundred ninety-eight thousand, thirteen".