198600889 has 2 divisors, whose sum is σ = 198600890. Its totient is φ = 198600888.

The previous prime is 198600877. The next prime is 198600907. The reversal of 198600889 is 988006891.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195021225 + 3579664 = 13965^2 + 1892^2 .

It is a cyclic number.

It is not a de Polignac number, because 198600889 - 2¹⁹ = 198076601 is a prime.

It is a super-2 number, since 2×198600889² = 78884626223180642, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (198600869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99300444 + 99300445.

It is an arithmetic number, because the mean of its divisors is an integer number (99300445).

Almost surely, 2^198600889 is an apocalyptic number.

It is an amenable number.

198600889 is a deficient number, since it is larger than the sum of its proper divisors (1).

198600889 is an equidigital number, since it uses as much as digits as its factorization.

198600889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 49.

The square root of 198600889 is about 14092.5827654124. The cubic root of 198600889 is about 583.4366802109.

The spelling of 198600889 in words is "one hundred ninety-eight million, six hundred thousand, eight hundred eighty-nine".