198930691 has 4 divisors (see below), whose sum is σ = 205790400. Its totient is φ = 192070984.

The previous prime is 198930661. The next prime is 198930701. The reversal of 198930691 is 196039891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198930691 - 2¹³ = 198922499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (198930601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3429811 + ... + 3429868.

It is an arithmetic number, because the mean of its divisors is an integer number (51447600).

Almost surely, 2^198930691 is an apocalyptic number.

198930691 is a deficient number, since it is larger than the sum of its proper divisors (6859709).

198930691 is an equidigital number, since it uses as much as digits as its factorization.

198930691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6859708.

The product of its (nonzero) digits is 104976, while the sum is 46.

The square root of 198930691 is about 14104.2791733573. The cubic root of 198930691 is about 583.7594585081.

The spelling of 198930691 in words is "one hundred ninety-eight million, nine hundred thirty thousand, six hundred ninety-one".