198427501 has 2 divisors, whose sum is σ = 198427502. Its totient is φ = 198427500.

The previous prime is 198427459. The next prime is 198427589. The reversal of 198427501 is 105724891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135606025 + 62821476 = 11645^2 + 7926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198427501 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 (198487501) 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, 99213750 + 99213751.

It is an arithmetic number, because the mean of its divisors is an integer number (99213751).

Almost surely, 2^198427501 is an apocalyptic number.

It is an amenable number.

198427501 is a deficient number, since it is larger than the sum of its proper divisors (1).

198427501 is an equidigital number, since it uses as much as digits as its factorization.

198427501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 198427501 is about 14086.4296754004. The cubic root of 198427501 is about 583.2668414733.

The spelling of 198427501 in words is "one hundred ninety-eight million, four hundred twenty-seven thousand, five hundred one".