198578673 has 6 divisors (see below), whose sum is σ = 286835874. Its totient is φ = 132385776.

The previous prime is 198578663. The next prime is 198578701. The reversal of 198578673 is 376875891.

198578673 is a `hidden beast` number, since 1 + 9 + 8 + 578 + 67 + 3 = 666.

198578673 is nontrivially palindromic in base 6.

It can be written as a sum of positive squares in only one way, i.e., 198471744 + 106929 = 14088^2 + 327^2 .

It is not a de Polignac number, because 198578673 - 2⁴ = 198578657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (198578603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11032140 + ... + 11032157.

It is an arithmetic number, because the mean of its divisors is an integer number (47805979).

Almost surely, 2^198578673 is an apocalyptic number.

It is an amenable number.

198578673 is a deficient number, since it is larger than the sum of its proper divisors (88257201).

198578673 is a wasteful number, since it uses less digits than its factorization.

198578673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22064303 (or 22064300 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 198578673 is about 14091.7945273127. The cubic root of 198578673 is about 583.4149244966.

The spelling of 198578673 in words is "one hundred ninety-eight million, five hundred seventy-eight thousand, six hundred seventy-three".