199474609 has 2 divisors, whose sum is σ = 199474610. Its totient is φ = 199474608.

The previous prime is 199474589. The next prime is 199474619. The reversal of 199474609 is 906474991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182169009 + 17305600 = 13497^2 + 4160^2 .

It is a cyclic number.

It is not a de Polignac number, because 199474609 - 2¹¹ = 199472561 is a prime.

It is not a weakly prime, because it can be changed into another prime (199474619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99737304 + 99737305.

It is an arithmetic number, because the mean of its divisors is an integer number (99737305).

Almost surely, 2^199474609 is an apocalyptic number.

It is an amenable number.

199474609 is a deficient number, since it is larger than the sum of its proper divisors (1).

199474609 is an equidigital number, since it uses as much as digits as its factorization.

199474609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 199474609 is about 14123.5480315677. The cubic root of 199474609 is about 584.2910143785.

The spelling of 199474609 in words is "one hundred ninety-nine million, four hundred seventy-four thousand, six hundred nine".