199756801 has 4 divisors (see below), whose sum is σ = 204402352. Its totient is φ = 195111252.

The previous prime is 199756789. The next prime is 199756807. The reversal of 199756801 is 108657991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 108657991 = 13 ⋅8358307.

It is a cyclic number.

It is not a de Polignac number, because 199756801 - 2⁵ = 199756769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199756807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2322711 + ... + 2322796.

It is an arithmetic number, because the mean of its divisors is an integer number (51100588).

Almost surely, 2^199756801 is an apocalyptic number.

It is an amenable number.

199756801 is a deficient number, since it is larger than the sum of its proper divisors (4645551).

199756801 is an equidigital number, since it uses as much as digits as its factorization.

199756801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4645550.

The product of its (nonzero) digits is 136080, while the sum is 46.

The square root of 199756801 is about 14133.5346251389. The cubic root of 199756801 is about 584.5664121014.

The spelling of 199756801 in words is "one hundred ninety-nine million, seven hundred fifty-six thousand, eight hundred one".