199623793 has 12 divisors (see below), whose sum is σ = 206243100. Its totient is φ = 193205120.

The previous prime is 199623763. The next prime is 199623817. The reversal of 199623793 is 397326991.

It can be written as a sum of positive squares in 6 ways, for example, as 100661089 + 98962704 = 10033^2 + 9948^2 .

It is a de Polignac number, because none of the positive numbers 2^k-199623793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199623713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250071 + ... + 250867.

It is an arithmetic number, because the mean of its divisors is an integer number (17186925).

Almost surely, 2^199623793 is an apocalyptic number.

It is an amenable number.

199623793 is a deficient number, since it is larger than the sum of its proper divisors (6619307).

199623793 is an equidigital number, since it uses as much as digits as its factorization.

199623793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028 (or 987 counting only the distinct ones).

The product of its digits is 551124, while the sum is 49.

The square root of 199623793 is about 14128.8284369229. The cubic root of 199623793 is about 584.4366388431.

The spelling of 199623793 in words is "one hundred ninety-nine million, six hundred twenty-three thousand, seven hundred ninety-three".