199856769 has 8 divisors (see below), whose sum is σ = 304543680. Its totient is φ = 114203856.

The previous prime is 199856731. The next prime is 199856791. The reversal of 199856769 is 967658991.

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

It is not a de Polignac number, because 199856769 - 2⁸ = 199856513 is a prime.

It is a super-2 number, since 2×199856769² = 79885456230238722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199855769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4758474 + ... + 4758515.

It is an arithmetic number, because the mean of its divisors is an integer number (38067960).

Almost surely, 2^199856769 is an apocalyptic number.

It is an amenable number.

199856769 is a deficient number, since it is larger than the sum of its proper divisors (104686911).

199856769 is an equidigital number, since it uses as much as digits as its factorization.

199856769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9516999.

The product of its digits is 7348320, while the sum is 60.

The square root of 199856769 is about 14137.0707361886. The cubic root of 199856769 is about 584.6639109752.

The spelling of 199856769 in words is "one hundred ninety-nine million, eight hundred fifty-six thousand, seven hundred sixty-nine".