198909061 has 16 divisors (see below), whose sum is σ = 227404800. Its totient is φ = 172355328.

The previous prime is 198909049. The next prime is 198909089. The reversal of 198909061 is 160909891.

It is a cyclic number.

It is not a de Polignac number, because 198909061 - 2⁷ = 198908933 is a prime.

It is a Duffinian number.

198909061 is a modest number, since divided by 9061 gives 1989 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 198908999 and 198909017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198909031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104920 + ... + 106798.

It is an arithmetic number, because the mean of its divisors is an integer number (14212800).

Almost surely, 2^198909061 is an apocalyptic number.

198909061 is the 8143-rd octagonal number.

It is an amenable number.

198909061 is a deficient number, since it is larger than the sum of its proper divisors (28495739).

198909061 is a wasteful number, since it uses less digits than its factorization.

198909061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 198909061 is about 14103.5123639468. The cubic root of 198909061 is about 583.7383000924.

The spelling of 198909061 in words is "one hundred ninety-eight million, nine hundred nine thousand, sixty-one".