198345657 has 8 divisors (see below), whose sum is σ = 272992000. Its totient is φ = 127964880.

The previous prime is 198345649. The next prime is 198345683. The reversal of 198345657 is 756543891.

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

It is not a de Polignac number, because 198345657 - 2³ = 198345649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198345457) 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, 1066282 + ... + 1066467.

It is an arithmetic number, because the mean of its divisors is an integer number (34124000).

Almost surely, 2^198345657 is an apocalyptic number.

It is an amenable number.

198345657 is a deficient number, since it is larger than the sum of its proper divisors (74646343).

198345657 is a wasteful number, since it uses less digits than its factorization.

198345657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132783.

The product of its digits is 907200, while the sum is 48.

The square root of 198345657 is about 14083.5243103422. The cubic root of 198345657 is about 583.1866384506.

The spelling of 198345657 in words is "one hundred ninety-eight million, three hundred forty-five thousand, six hundred fifty-seven".