199004981 has 8 divisors (see below), whose sum is σ = 233581440. Its totient is φ = 165965328.

The previous prime is 199004969. The next prime is 199004987. The reversal of 199004981 is 189400991.

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-199004981 is a prime.

It is a super-2 number, since 2×199004981² = 79205964925620722, 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 (199004987) 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, 383921 + ... + 384438.

It is an arithmetic number, because the mean of its divisors is an integer number (29197680).

Almost surely, 2^199004981 is an apocalyptic number.

It is an amenable number.

199004981 is a deficient number, since it is larger than the sum of its proper divisors (34576459).

199004981 is an equidigital number, since it uses as much as digits as its factorization.

199004981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768403.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 199004981 is about 14106.9125254253. The cubic root of 199004981 is about 583.8321171354.

The spelling of 199004981 in words is "one hundred ninety-nine million, four thousand, nine hundred eighty-one".