199620685 has 16 divisors (see below), whose sum is σ = 261600192. Its totient is φ = 145024000.

The previous prime is 199620679. The next prime is 199620697. The reversal of 199620685 is 586026991.

It is not a de Polignac number, because 199620685 - 2⁷ = 199620557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86922 + ... + 89188.

It is an arithmetic number, because the mean of its divisors is an integer number (16350012).

Almost surely, 2^199620685 is an apocalyptic number.

It is an amenable number.

199620685 is a deficient number, since it is larger than the sum of its proper divisors (61979507).

199620685 is a wasteful number, since it uses less digits than its factorization.

199620685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3884.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 199620685 is about 14128.7184486067. The cubic root of 199620685 is about 584.4336057403.

The spelling of 199620685 in words is "one hundred ninety-nine million, six hundred twenty thousand, six hundred eighty-five".