199990177 has 8 divisors (see below), whose sum is σ = 207219240. Its totient is φ = 192783360.

The previous prime is 199990151. The next prime is 199990183. The reversal of 199990177 is 771099991.

It can be written as a sum of positive squares in 4 ways, for example, as 70576801 + 129413376 = 8401^2 + 11376^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199990177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199990127) 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 7 ways as a sum of consecutive naturals, for example, 13953 + ... + 24385.

It is an arithmetic number, because the mean of its divisors is an integer number (25902405).

Almost surely, 2^199990177 is an apocalyptic number.

It is an amenable number.

199990177 is a deficient number, since it is larger than the sum of its proper divisors (7229063).

199990177 is a wasteful number, since it uses less digits than its factorization.

199990177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11123.

The product of its (nonzero) digits is 321489, while the sum is 52.

The square root of 199990177 is about 14141.7883239709. The cubic root of 199990177 is about 584.7939732771.

The spelling of 199990177 in words is "one hundred ninety-nine million, nine hundred ninety thousand, one hundred seventy-seven".