206111998 has 8 divisors (see below), whose sum is σ = 311243400. Its totient is φ = 102364200.

The previous prime is 206111989. The next prime is 206111999. The reversal of 206111998 is 899111602.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206111999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345528 + ... + 346123.

It is an arithmetic number, because the mean of its divisors is an integer number (38905425).

Almost surely, 2^206111998 is an apocalyptic number.

206111998 is a deficient number, since it is larger than the sum of its proper divisors (105131402).

206111998 is a wasteful number, since it uses less digits than its factorization.

206111998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691802.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 206111998 is about 14356.6011994483. The cubic root of 206111998 is about 590.7010702875.

The spelling of 206111998 in words is "two hundred six million, one hundred eleven thousand, nine hundred ninety-eight".