199770623 has 12 divisors (see below), whose sum is σ = 217080360. Its totient is φ = 182747616.

The previous prime is 199770611. The next prime is 199770629. The reversal of 199770623 is 326077991.

It is a happy number.

It is not a de Polignac number, because 199770623 - 2⁴ = 199770607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199770629) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 681665 + ... + 681957.

It is an arithmetic number, because the mean of its divisors is an integer number (18090030).

Almost surely, 2^199770623 is an apocalyptic number.

199770623 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

199770623 is a deficient number, since it is larger than the sum of its proper divisors (17309737).

199770623 is an equidigital number, since it uses as much as digits as its factorization.

199770623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 199770623 is about 14134.0235955654. The cubic root of 199770623 is about 584.5798946471.

The spelling of 199770623 in words is "one hundred ninety-nine million, seven hundred seventy thousand, six hundred twenty-three".