198253501 has 2 divisors, whose sum is σ = 198253502. Its totient is φ = 198253500.

The previous prime is 198253499. The next prime is 198253519. The reversal of 198253501 is 105352891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151659225 + 46594276 = 12315^2 + 6826^2 .

It is a cyclic number.

It is not a de Polignac number, because 198253501 - 2¹ = 198253499 is a prime.

Together with 198253499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198253571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99126750 + 99126751.

It is an arithmetic number, because the mean of its divisors is an integer number (99126751).

Almost surely, 2^198253501 is an apocalyptic number.

It is an amenable number.

198253501 is a deficient number, since it is larger than the sum of its proper divisors (1).

198253501 is an equidigital number, since it uses as much as digits as its factorization.

198253501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 198253501 is about 14080.2521639351. The cubic root of 198253501 is about 583.0963037719.

The spelling of 198253501 in words is "one hundred ninety-eight million, two hundred fifty-three thousand, five hundred one".