199006785 has 48 divisors (see below), whose sum is σ = 354161808. Its totient is φ = 103334400.

The previous prime is 199006751. The next prime is 199006807. The reversal of 199006785 is 587600991.

199006785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 28547649 + 170459136 = 5343^2 + 13056^2 .

It is not a de Polignac number, because 199006785 - 2⁹ = 199006273 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 199006785.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 431455 + ... + 431915.

It is an arithmetic number, because the mean of its divisors is an integer number (7378371).

Almost surely, 2^199006785 is an apocalyptic number.

199006785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

199006785 is the 8145-th octagonal number.

It is an amenable number.

199006785 is a deficient number, since it is larger than the sum of its proper divisors (155155023).

199006785 is a wasteful number, since it uses less digits than its factorization.

199006785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 199006785 is about 14106.9764655648. The cubic root of 199006785 is about 583.8338812955.

The spelling of 199006785 in words is "one hundred ninety-nine million, six thousand, seven hundred eighty-five".