198464261 has 2 divisors, whose sum is σ = 198464262. Its totient is φ = 198464260.

The previous prime is 198464249. The next prime is 198464323. The reversal of 198464261 is 162464891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190164100 + 8300161 = 13790^2 + 2881^2 .

It is a cyclic number.

It is not a de Polignac number, because 198464261 - 2¹⁴ = 198447877 is a prime.

It is a super-2 number, since 2×198464261² = 78776125788552242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198464561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99232130 + 99232131.

It is an arithmetic number, because the mean of its divisors is an integer number (99232131).

Almost surely, 2^198464261 is an apocalyptic number.

It is an amenable number.

198464261 is a deficient number, since it is larger than the sum of its proper divisors (1).

198464261 is an equidigital number, since it uses as much as digits as its factorization.

198464261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 41.

The square root of 198464261 is about 14087.7344168606. The cubic root of 198464261 is about 583.3028572559.

The spelling of 198464261 in words is "one hundred ninety-eight million, four hundred sixty-four thousand, two hundred sixty-one".