199800257 has 8 divisors (see below), whose sum is σ = 215446560. Its totient is φ = 184667040.

The previous prime is 199800253. The next prime is 199800329. The reversal of 199800257 is 752008991.

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

It is a cyclic number.

It is not a de Polignac number, because 199800257 - 2² = 199800253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199800253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127463 + ... + 129020.

It is an arithmetic number, because the mean of its divisors is an integer number (26930820).

Almost surely, 2^199800257 is an apocalyptic number.

It is an amenable number.

199800257 is a deficient number, since it is larger than the sum of its proper divisors (15646303).

199800257 is a wasteful number, since it uses less digits than its factorization.

199800257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256543.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 199800257 is about 14135.0718781335. The cubic root of 199800257 is about 584.6087987703.

The spelling of 199800257 in words is "one hundred ninety-nine million, eight hundred thousand, two hundred fifty-seven".