198938713 has 2 divisors, whose sum is σ = 198938714. Its totient is φ = 198938712.

The previous prime is 198938711. The next prime is 198938717. The reversal of 198938713 is 317839891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191905609 + 7033104 = 13853^2 + 2652^2 .

It is an emirp because it is prime and its reverse (317839891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198938713 - 2¹ = 198938711 is a prime.

It is a super-2 number, since 2×198938713² = 79153223060192738, which contains 22 as substring.

Together with 198938711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (198938711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99469356 + 99469357.

It is an arithmetic number, because the mean of its divisors is an integer number (99469357).

Almost surely, 2^198938713 is an apocalyptic number.

It is an amenable number.

198938713 is a deficient number, since it is larger than the sum of its proper divisors (1).

198938713 is an equidigital number, since it uses as much as digits as its factorization.

198938713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 49.

The square root of 198938713 is about 14104.5635522692. The cubic root of 198938713 is about 583.7673052200.

The spelling of 198938713 in words is "one hundred ninety-eight million, nine hundred thirty-eight thousand, seven hundred thirteen".