198673945 has 32 divisors (see below), whose sum is σ = 251475840. Its totient is φ = 150558720.

The previous prime is 198673939. The next prime is 198673957. The reversal of 198673945 is 549376891.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-198673945 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 198673892 and 198673901.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1516530 + ... + 1516660.

It is an arithmetic number, because the mean of its divisors is an integer number (7858620).

Almost surely, 2^198673945 is an apocalyptic number.

It is an amenable number.

198673945 is a deficient number, since it is larger than the sum of its proper divisors (52801895).

198673945 is a wasteful number, since it uses less digits than its factorization.

198673945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345.

The product of its digits is 1632960, while the sum is 52.

The square root of 198673945 is about 14095.1745288946. The cubic root of 198673945 is about 583.5082111508.

The spelling of 198673945 in words is "one hundred ninety-eight million, six hundred seventy-three thousand, nine hundred forty-five".