199099805 has 8 divisors (see below), whose sum is σ = 240801792. Its totient is φ = 158025168.

The previous prime is 199099793. The next prime is 199099837. The reversal of 199099805 is 508990991.

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

It is a cyclic number.

It is not a de Polignac number, because 199099805 - 2²⁴ = 182322589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156137 + ... + 157406.

It is an arithmetic number, because the mean of its divisors is an integer number (30100224).

Almost surely, 2^199099805 is an apocalyptic number.

It is an amenable number.

199099805 is a deficient number, since it is larger than the sum of its proper divisors (41701987).

199099805 is a wasteful number, since it uses less digits than its factorization.

199099805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313675.

The product of its (nonzero) digits is 262440, while the sum is 50.

The square root of 199099805 is about 14110.2730306681. The cubic root of 199099805 is about 583.9248325802.

The spelling of 199099805 in words is "one hundred ninety-nine million, ninety-nine thousand, eight hundred five".