198106457 has 8 divisors (see below), whose sum is σ = 214223616. Its totient is φ = 182485312.

The previous prime is 198106439. The next prime is 198106459. The reversal of 198106457 is 754601891.

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

It is a cyclic number.

It is not a de Polignac number, because 198106457 - 2⁶ = 198106393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198106459) 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, 123173 + ... + 124770.

It is an arithmetic number, because the mean of its divisors is an integer number (26777952).

Almost surely, 2^198106457 is an apocalyptic number.

198106457 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

198106457 is a deficient number, since it is larger than the sum of its proper divisors (16117159).

198106457 is a wasteful number, since it uses less digits than its factorization.

198106457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248007.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 198106457 is about 14075.0295559192. The cubic root of 198106457 is about 582.9521078828.

The spelling of 198106457 in words is "one hundred ninety-eight million, one hundred six thousand, four hundred fifty-seven".