198652261 has 2 divisors, whose sum is σ = 198652262. Its totient is φ = 198652260.

The previous prime is 198652243. The next prime is 198652273. The reversal of 198652261 is 162256891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196420225 + 2232036 = 14015^2 + 1494^2 .

It is a cyclic number.

It is not a de Polignac number, because 198652261 - 2²¹ = 196555109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198652211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99326130 + 99326131.

It is an arithmetic number, because the mean of its divisors is an integer number (99326131).

Almost surely, 2^198652261 is an apocalyptic number.

It is an amenable number.

198652261 is a deficient number, since it is larger than the sum of its proper divisors (1).

198652261 is an equidigital number, since it uses as much as digits as its factorization.

198652261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 198652261 is about 14094.4053084903. The cubic root of 198652261 is about 583.4869816393.

The spelling of 198652261 in words is "one hundred ninety-eight million, six hundred fifty-two thousand, two hundred sixty-one".