998866197 has 24 divisors (see below), whose sum is σ = 1649995776. Its totient is φ = 570409056.

The previous prime is 998866177. The next prime is 998866199. The reversal of 998866197 is 791668899.

998866197 is a `hidden beast` number, since 9 + 9 + 8 + 8 + 6 + 619 + 7 = 666.

It is not a de Polignac number, because 998866197 - 2⁸ = 998865941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998866199) 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 in 23 ways as a sum of consecutive naturals, for example, 114028 + ... + 122474.

It is an arithmetic number, because the mean of its divisors is an integer number (68749824).

Almost surely, 2^998866197 is an apocalyptic number.

It is an amenable number.

998866197 is a deficient number, since it is larger than the sum of its proper divisors (651129579).

998866197 is a wasteful number, since it uses less digits than its factorization.

998866197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10337 (or 10334 counting only the distinct ones).

The product of its digits is 11757312, while the sum is 63.

The square root of 998866197 is about 31604.8445178900. The cubic root of 998866197 is about 999.6219227423.

The spelling of 998866197 in words is "nine hundred ninety-eight million, eight hundred sixty-six thousand, one hundred ninety-seven".