198317653 has 2 divisors, whose sum is σ = 198317654. Its totient is φ = 198317652.

The previous prime is 198317617. The next prime is 198317671. The reversal of 198317653 is 356713891.

198317653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198049329 + 268324 = 14073^2 + 518^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198317653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198317683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99158826 + 99158827.

It is an arithmetic number, because the mean of its divisors is an integer number (99158827).

Almost surely, 2^198317653 is an apocalyptic number.

It is an amenable number.

198317653 is a deficient number, since it is larger than the sum of its proper divisors (1).

198317653 is an equidigital number, since it uses as much as digits as its factorization.

198317653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 136080, while the sum is 43.

The square root of 198317653 is about 14082.5300638770. The cubic root of 198317653 is about 583.1591908665.

The spelling of 198317653 in words is "one hundred ninety-eight million, three hundred seventeen thousand, six hundred fifty-three".