198712011 has 8 divisors (see below), whose sum is σ = 265159744. Its totient is φ = 132369480.

The previous prime is 198712001. The next prime is 198712021. The reversal of 198712011 is 110217891.

It is an interprime number because it is at equal distance from previous prime (198712001) and next prime (198712021).

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

It is a de Polignac number, because none of the positive numbers 2^k-198712011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 198712011.

It is not an unprimeable number, because it can be changed into a prime (198712001) 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, 21781 + ... + 29526.

It is an arithmetic number, because the mean of its divisors is an integer number (33144968).

Almost surely, 2^198712011 is an apocalyptic number.

198712011 is a deficient number, since it is larger than the sum of its proper divisors (66447733).

198712011 is a wasteful number, since it uses less digits than its factorization.

198712011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52601.

The product of its (nonzero) digits is 1008, while the sum is 30.

The square root of 198712011 is about 14096.5247844992. The cubic root of 198712011 is about 583.5454755660.

The spelling of 198712011 in words is "one hundred ninety-eight million, seven hundred twelve thousand, eleven".