198727541 has 2 divisors, whose sum is σ = 198727542. Its totient is φ = 198727540.

The previous prime is 198727537. The next prime is 198727559. The reversal of 198727541 is 145727891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192626641 + 6100900 = 13879^2 + 2470^2 .

It is a cyclic number.

It is not a de Polignac number, because 198727541 - 2² = 198727537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198727492 and 198727501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198727511) 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, 99363770 + 99363771.

It is an arithmetic number, because the mean of its divisors is an integer number (99363771).

Almost surely, 2^198727541 is an apocalyptic number.

It is an amenable number.

198727541 is a deficient number, since it is larger than the sum of its proper divisors (1).

198727541 is an equidigital number, since it uses as much as digits as its factorization.

198727541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 44.

The square root of 198727541 is about 14097.0756187232. The cubic root of 198727541 is about 583.5606771721.

The spelling of 198727541 in words is "one hundred ninety-eight million, seven hundred twenty-seven thousand, five hundred forty-one".