199746545 has 4 divisors (see below), whose sum is σ = 239695860. Its totient is φ = 159797232.

The previous prime is 199746517. The next prime is 199746551. The reversal of 199746545 is 545647991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31888609 + 167857936 = 5647^2 + 12956^2 .

It is a cyclic number.

It is not a de Polignac number, because 199746545 - 2⁸ = 199746289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199746493 and 199746502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19974650 + ... + 19974659.

It is an arithmetic number, because the mean of its divisors is an integer number (59923965).

Almost surely, 2^199746545 is an apocalyptic number.

It is an amenable number.

199746545 is a deficient number, since it is larger than the sum of its proper divisors (39949315).

199746545 is an equidigital number, since it uses as much as digits as its factorization.

199746545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39949314.

The product of its digits is 1360800, while the sum is 50.

The square root of 199746545 is about 14133.1717954605. The cubic root of 199746545 is about 584.5564075764.

The spelling of 199746545 in words is "one hundred ninety-nine million, seven hundred forty-six thousand, five hundred forty-five".