198645079 has 8 divisors (see below), whose sum is σ = 205242752. Its totient is φ = 192137400.

The previous prime is 198645067. The next prime is 198645091. The reversal of 198645079 is 970546891.

It is an interprime number because it is at equal distance from previous prime (198645067) and next prime (198645091).

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 198645079 - 2¹¹ = 198643031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198645059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17997 + ... + 26854.

It is an arithmetic number, because the mean of its divisors is an integer number (25655344).

Almost surely, 2^198645079 is an apocalyptic number.

198645079 is a deficient number, since it is larger than the sum of its proper divisors (6597673).

198645079 is a wasteful number, since it uses less digits than its factorization.

198645079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44997.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 198645079 is about 14094.1505242423. The cubic root of 198645079 is about 583.4799498308.

The spelling of 198645079 in words is "one hundred ninety-eight million, six hundred forty-five thousand, seventy-nine".