198475997 has 2 divisors, whose sum is σ = 198475998. Its totient is φ = 198475996.

The previous prime is 198475987. The next prime is 198476011. The reversal of 198475997 is 799574891.

198475997 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 can be written as a sum of positive squares in only one way, i.e., 146434201 + 52041796 = 12101^2 + 7214^2 .

It is a cyclic number.

It is not a de Polignac number, because 198475997 - 2⁶ = 198475933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198475987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99237998 + 99237999.

It is an arithmetic number, because the mean of its divisors is an integer number (99237999).

Almost surely, 2^198475997 is an apocalyptic number.

It is an amenable number.

198475997 is a deficient number, since it is larger than the sum of its proper divisors (1).

198475997 is an equidigital number, since it uses as much as digits as its factorization.

198475997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5715360, while the sum is 59.

The square root of 198475997 is about 14088.1509432572. The cubic root of 198475997 is about 583.3143547204.

The spelling of 198475997 in words is "one hundred ninety-eight million, four hundred seventy-five thousand, nine hundred ninety-seven".