198667013 has 2 divisors, whose sum is σ = 198667014. Its totient is φ = 198667012.

The previous prime is 198666977. The next prime is 198667039. The reversal of 198667013 is 310766891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134954689 + 63712324 = 11617^2 + 7982^2 .

It is a cyclic number.

It is not a de Polignac number, because 198667013 - 2¹⁴ = 198650629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198667613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99333506 + 99333507.

It is an arithmetic number, because the mean of its divisors is an integer number (99333507).

Almost surely, 2^198667013 is an apocalyptic number.

It is an amenable number.

198667013 is a deficient number, since it is larger than the sum of its proper divisors (1).

198667013 is an equidigital number, since it uses as much as digits as its factorization.

198667013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 198667013 is about 14094.9286269921. The cubic root of 198667013 is about 583.5014246109.

The spelling of 198667013 in words is "one hundred ninety-eight million, six hundred sixty-seven thousand, thirteen".