199118723 has 2 divisors, whose sum is σ = 199118724. Its totient is φ = 199118722.

The previous prime is 199118629. The next prime is 199118737. The reversal of 199118723 is 327811991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199118723 - 2¹⁸ = 198856579 is a prime.

It is not a weakly prime, because it can be changed into another prime (199118753) 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 as a sum of consecutive naturals, namely, 99559361 + 99559362.

It is an arithmetic number, because the mean of its divisors is an integer number (99559362).

Almost surely, 2^199118723 is an apocalyptic number.

199118723 is a deficient number, since it is larger than the sum of its proper divisors (1).

199118723 is an equidigital number, since it uses as much as digits as its factorization.

199118723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 41.

The square root of 199118723 is about 14110.9433773933. The cubic root of 199118723 is about 583.9433263872.

The spelling of 199118723 in words is "one hundred ninety-nine million, one hundred eighteen thousand, seven hundred twenty-three".