198481729 has 2 divisors, whose sum is σ = 198481730. Its totient is φ = 198481728.

The previous prime is 198481693. The next prime is 198481753. The reversal of 198481729 is 927184891.

198481729 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., 132871729 + 65610000 = 11527^2 + 8100^2 .

It is a cyclic number.

It is not a de Polignac number, because 198481729 - 2⁷ = 198481601 is a prime.

It is not a weakly prime, because it can be changed into another prime (198481769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99240864 + 99240865.

It is an arithmetic number, because the mean of its divisors is an integer number (99240865).

Almost surely, 2^198481729 is an apocalyptic number.

It is an amenable number.

198481729 is a deficient number, since it is larger than the sum of its proper divisors (1).

198481729 is an equidigital number, since it uses as much as digits as its factorization.

198481729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 49.

The square root of 198481729 is about 14088.3543751568. The cubic root of 198481729 is about 583.3199700521.

The spelling of 198481729 in words is "one hundred ninety-eight million, four hundred eighty-one thousand, seven hundred twenty-nine".