198971603 has 2 divisors, whose sum is σ = 198971604.
Its totient is φ = 198971602.
The previous prime is 198971599. The next prime is 198971611. The reversal of 198971603 is 306179891.
198971603 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 198971603 - 22 = 198971599 is a prime.
It is a Sophie Germain prime.
It is not a weakly prime, because it can be changed into another prime (198971623) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99485801 + 99485802.
It is an arithmetic number, because the mean of its divisors is an integer number (99485802).
Almost surely, 2198971603 is an apocalyptic number.
198971603 is a deficient number, since it is larger than the sum of its proper divisors (1).
198971603 is an equidigital number, since it uses as much as digits as its factorization.
198971603 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 81648, while the sum is 44.
The square root of 198971603 is about 14105.7294387777.
The cubic root of 198971603 is about 583.7994743377.
The spelling of 198971603 in words is "one hundred ninety-eight million, nine hundred seventy-one thousand, six hundred three".