198966993 has 8 divisors (see below), whose sum is σ = 279252000. Its totient is φ = 125663328.

The previous prime is 198966991. The next prime is 198967003. The reversal of 198966993 is 399669891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 198966993 - 2¹ = 198966991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198966991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1745268 + ... + 1745381.

It is an arithmetic number, because the mean of its divisors is an integer number (34906500).

Almost surely, 2^198966993 is an apocalyptic number.

It is an amenable number.

198966993 is a deficient number, since it is larger than the sum of its proper divisors (80285007).

198966993 is a wasteful number, since it uses less digits than its factorization.

198966993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490671.

The product of its digits is 5668704, while the sum is 60.

The square root of 198966993 is about 14105.5660290539. The cubic root of 198966993 is about 583.7949655932.

The spelling of 198966993 in words is "one hundred ninety-eight million, nine hundred sixty-six thousand, nine hundred ninety-three".