19989201 has 4 divisors (see below), whose sum is σ = 26652272. Its totient is φ = 13326132.

The previous prime is 19989199. The next prime is 19989209. The reversal of 19989201 is 10298991.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 19989201 - 2¹ = 19989199 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19989201.

It is not an unprimeable number, because it can be changed into a prime (19989209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3331531 + ... + 3331536.

It is an arithmetic number, because the mean of its divisors is an integer number (6663068).

Almost surely, 2^19989201 is an apocalyptic number.

It is an amenable number.

19989201 is a deficient number, since it is larger than the sum of its proper divisors (6663071).

19989201 is an equidigital number, since it uses as much as digits as its factorization.

19989201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6663070.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 19989201 is about 4470.9284270719. The cubic root of 19989201 is about 271.3928978707.

The spelling of 19989201 in words is "nineteen million, nine hundred eighty-nine thousand, two hundred one".