199162661 has 2 divisors, whose sum is σ = 199162662. Its totient is φ = 199162660.

The previous prime is 199162657. The next prime is 199162673. The reversal of 199162661 is 166261991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195832036 + 3330625 = 13994^2 + 1825^2 .

It is a cyclic number.

It is not a de Polignac number, because 199162661 - 2² = 199162657 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199162961) by changing a digit.

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 as a sum of consecutive naturals, namely, 99581330 + 99581331.

It is an arithmetic number, because the mean of its divisors is an integer number (99581331).

Almost surely, 2^199162661 is an apocalyptic number.

It is an amenable number.

199162661 is a deficient number, since it is larger than the sum of its proper divisors (1).

199162661 is an equidigital number, since it uses as much as digits as its factorization.

199162661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 41.

The square root of 199162661 is about 14112.5001682905. The cubic root of 199162661 is about 583.9862746587.

The spelling of 199162661 in words is "one hundred ninety-nine million, one hundred sixty-two thousand, six hundred sixty-one".