19990201 has 16 divisors (see below), whose sum is σ = 25211520. Its totient is φ = 15396480.

The previous prime is 19990177. The next prime is 19990213. The reversal of 19990201 is 10209991.

It is not a de Polignac number, because 19990201 - 2⁹ = 19989689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19990241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5395 + ... + 8311.

It is an arithmetic number, because the mean of its divisors is an integer number (1575720).

Almost surely, 2^19990201 is an apocalyptic number.

19990201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

19990201 is a deficient number, since it is larger than the sum of its proper divisors (5221319).

19990201 is a wasteful number, since it uses less digits than its factorization.

19990201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 19990201 is about 4471.0402592685. The cubic root of 19990201 is about 271.3974234538.

The spelling of 19990201 in words is "nineteen million, nine hundred ninety thousand, two hundred one".