199988001 has 8 divisors (see below), whose sum is σ = 296278560. Its totient is φ = 133325316.

The previous prime is 199987987. The next prime is 199988023. The reversal of 199988001 is 100889991.

It is not a de Polignac number, because 199988001 - 2¹¹ = 199985953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (199988081) 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, 3703455 + ... + 3703508.

It is an arithmetic number, because the mean of its divisors is an integer number (37034820).

Almost surely, 2^199988001 is an apocalyptic number.

It is an amenable number.

199988001 is a deficient number, since it is larger than the sum of its proper divisors (96290559).

199988001 is an equidigital number, since it uses as much as digits as its factorization.

199988001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7406972 (or 7406966 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 199988001 is about 14141.7113886545. The cubic root of 199988001 is about 584.7918523124.

It can be divided in two parts, 1999 and 88001, that added together give a square (90000 = 300²).

The spelling of 199988001 in words is "one hundred ninety-nine million, nine hundred eighty-eight thousand, one".