199890527 has 4 divisors (see below), whose sum is σ = 200322720. Its totient is φ = 199458336.

The previous prime is 199890517. The next prime is 199890557. The reversal of 199890527 is 725098991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 725098991 = 67 ⋅10822373.

It is a cyclic number.

It is not a de Polignac number, because 199890527 - 2¹² = 199886431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199890517) 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 in 3 ways as a sum of consecutive naturals, for example, 215402 + ... + 216327.

It is an arithmetic number, because the mean of its divisors is an integer number (50080680).

Almost surely, 2^199890527 is an apocalyptic number.

199890527 is a deficient number, since it is larger than the sum of its proper divisors (432193).

199890527 is an equidigital number, since it uses as much as digits as its factorization.

199890527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432192.

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 199890527 is about 14138.2646389152. The cubic root of 199890527 is about 584.6968278374.

The spelling of 199890527 in words is "one hundred ninety-nine million, eight hundred ninety thousand, five hundred twenty-seven".