198450761 has 2 divisors, whose sum is σ = 198450762. Its totient is φ = 198450760.

The previous prime is 198450757. The next prime is 198450767. The reversal of 198450761 is 167054891.

198450761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190992400 + 7458361 = 13820^2 + 2731^2 .

It is an emirp because it is prime and its reverse (167054891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198450761 - 2² = 198450757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_10997843 and since 198450761 and 10997843 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (198450767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99225380 + 99225381.

It is an arithmetic number, because the mean of its divisors is an integer number (99225381).

Almost surely, 2^198450761 is an apocalyptic number.

It is an amenable number.

198450761 is a deficient number, since it is larger than the sum of its proper divisors (1).

198450761 is an equidigital number, since it uses as much as digits as its factorization.

198450761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 198450761 is about 14087.2552685042. The cubic root of 198450761 is about 583.2896310843.

The spelling of 198450761 in words is "one hundred ninety-eight million, four hundred fifty thousand, seven hundred sixty-one".