199686105 has 24 divisors (see below), whose sum is σ = 364341120. Its totient is φ = 100893600.

The previous prime is 199686101. The next prime is 199686209. The reversal of 199686105 is 501686991.

It is not a de Polignac number, because 199686105 - 2² = 199686101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (199686101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115921 + ... + 117630.

It is an arithmetic number, because the mean of its divisors is an integer number (15180880).

Almost surely, 2^199686105 is an apocalyptic number.

199686105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

199686105 is a deficient number, since it is larger than the sum of its proper divisors (164655015).

199686105 is a wasteful number, since it uses less digits than its factorization.

199686105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233581 (or 233578 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 199686105 is about 14131.0334017014. The cubic root of 199686105 is about 584.4974425960.

The spelling of 199686105 in words is "one hundred ninety-nine million, six hundred eighty-six thousand, one hundred five".