198061693 has 8 divisors (see below), whose sum is σ = 206221176. Its totient is φ = 190060800.

The previous prime is 198061657. The next prime is 198061727. The reversal of 198061693 is 396160891.

It can be written as a sum of positive squares in 4 ways, for example, as 16297369 + 181764324 = 4037^2 + 13482^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198061693 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 (198061093) 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, 37096 + ... + 42097.

It is an arithmetic number, because the mean of its divisors is an integer number (25777647).

Almost surely, 2^198061693 is an apocalyptic number.

It is an amenable number.

198061693 is a deficient number, since it is larger than the sum of its proper divisors (8159483).

198061693 is an equidigital number, since it uses as much as digits as its factorization.

198061693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79295.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 198061693 is about 14073.4392740367. The cubic root of 198061693 is about 582.9081967549.

The spelling of 198061693 in words is "one hundred ninety-eight million, sixty-one thousand, six hundred ninety-three".