199883665 has 4 divisors (see below), whose sum is σ = 239860404. Its totient is φ = 159906928.

The previous prime is 199883659. The next prime is 199883693. The reversal of 199883665 is 566388991.

It is a happy number.

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 42732369 + 157151296 = 6537^2 + 12536^2 .

It is a cyclic number.

It is not a de Polignac number, because 199883665 - 2⁵ = 199883633 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19988362 + ... + 19988371.

It is an arithmetic number, because the mean of its divisors is an integer number (59965101).

Almost surely, 2^199883665 is an apocalyptic number.

It is an amenable number.

199883665 is a deficient number, since it is larger than the sum of its proper divisors (39976739).

199883665 is an equidigital number, since it uses as much as digits as its factorization.

199883665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39976738.

The product of its digits is 2799360, while the sum is 55.

The square root of 199883665 is about 14138.0219620709. The cubic root of 199883665 is about 584.6901371158.

It can be divided in two parts, 19988 and 3665, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 199883665 in words is "one hundred ninety-nine million, eight hundred eighty-three thousand, six hundred sixty-five".