199766312723 has 2 divisors, whose sum is σ = 199766312724. Its totient is φ = 199766312722.

The previous prime is 199766312699. The next prime is 199766312761. The reversal of 199766312723 is 327213667991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199766312723 - 2⁶ = 199766312659 is a prime.

It is a super-3 number, since 3×199766312723³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (199766312023) 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 as a sum of consecutive naturals, namely, 99883156361 + 99883156362.

It is an arithmetic number, because the mean of its divisors is an integer number (99883156362).

Almost surely, 2^199766312723 is an apocalyptic number.

199766312723 is a deficient number, since it is larger than the sum of its proper divisors (1).

199766312723 is an equidigital number, since it uses as much as digits as its factorization.

199766312723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5143824, while the sum is 56.

The spelling of 199766312723 in words is "one hundred ninety-nine billion, seven hundred sixty-six million, three hundred twelve thousand, seven hundred twenty-three".