199723523 has 2 divisors, whose sum is σ = 199723524. Its totient is φ = 199723522.

The previous prime is 199723507. The next prime is 199723529. The reversal of 199723523 is 325327991.

It is a happy number.

199723523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (325327991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199723523 - 2⁴ = 199723507 is a prime.

It is not a weakly prime, because it can be changed into another prime (199723529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99861761 + 99861762.

It is an arithmetic number, because the mean of its divisors is an integer number (99861762).

Almost surely, 2^199723523 is an apocalyptic number.

199723523 is a deficient number, since it is larger than the sum of its proper divisors (1).

199723523 is an equidigital number, since it uses as much as digits as its factorization.

199723523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 41.

The square root of 199723523 is about 14132.3573051349. The cubic root of 199723523 is about 584.5339488239.

The spelling of 199723523 in words is "one hundred ninety-nine million, seven hundred twenty-three thousand, five hundred twenty-three".