198478047 has 8 divisors (see below), whose sum is σ = 278565760. Its totient is φ = 125354520.

The previous prime is 198478031. The next prime is 198478061. The reversal of 198478047 is 740874891.

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

It is not a de Polignac number, because 198478047 - 2⁴ = 198478031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198477987 and 198478005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198478547) 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, 1740979 + ... + 1741092.

It is an arithmetic number, because the mean of its divisors is an integer number (34820720).

Almost surely, 2^198478047 is an apocalyptic number.

198478047 is a deficient number, since it is larger than the sum of its proper divisors (80087713).

198478047 is a wasteful number, since it uses less digits than its factorization.

198478047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3482093.

The product of its (nonzero) digits is 451584, while the sum is 48.

The square root of 198478047 is about 14088.2236992461. The cubic root of 198478047 is about 583.3163630074.

The spelling of 198478047 in words is "one hundred ninety-eight million, four hundred seventy-eight thousand, forty-seven".