198433969 has 2 divisors, whose sum is σ = 198433970. Its totient is φ = 198433968.

The previous prime is 198433919. The next prime is 198433981. The reversal of 198433969 is 969334891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139712400 + 58721569 = 11820^2 + 7663^2 .

It is a cyclic number.

It is not a de Polignac number, because 198433969 - 2²¹ = 196336817 is a prime.

It is a super-2 number, since 2×198433969² = 78752080106185922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (198433919) 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, 99216984 + 99216985.

It is an arithmetic number, because the mean of its divisors is an integer number (99216985).

Almost surely, 2^198433969 is an apocalyptic number.

It is an amenable number.

198433969 is a deficient number, since it is larger than the sum of its proper divisors (1).

198433969 is an equidigital number, since it uses as much as digits as its factorization.

198433969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 52.

The square root of 198433969 is about 14086.6592561899. The cubic root of 198433969 is about 583.2731788491.

It can be divided in two parts, 1984 and 33969, that added together give a palindrome (35953).

The spelling of 198433969 in words is "one hundred ninety-eight million, four hundred thirty-three thousand, nine hundred sixty-nine".