199825919 has 8 divisors (see below), whose sum is σ = 201450240. Its totient is φ = 198208000.

The previous prime is 199825877. The next prime is 199825943. The reversal of 199825919 is 919528991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199825919 is a prime.

It is a super-2 number, since 2×199825919² = 79860795808389122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199825949) 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 in 7 ways as a sum of consecutive naturals, for example, 75287 + ... + 77895.

It is an arithmetic number, because the mean of its divisors is an integer number (25181280).

Almost surely, 2^199825919 is an apocalyptic number.

199825919 is a deficient number, since it is larger than the sum of its proper divisors (1624321).

199825919 is a wasteful number, since it uses less digits than its factorization.

199825919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3201.

The product of its digits is 524880, while the sum is 53.

The square root of 199825919 is about 14135.9795911002. The cubic root of 199825919 is about 584.6338264137.

The spelling of 199825919 in words is "one hundred ninety-nine million, eight hundred twenty-five thousand, nine hundred nineteen".