19973201 has 2 divisors, whose sum is σ = 19973202. Its totient is φ = 19973200.

The previous prime is 19973197. The next prime is 19973221. The reversal of 19973201 is 10237991.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10394176 + 9579025 = 3224^2 + 3095^2 .

It is an emirp because it is prime and its reverse (10237991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19973201 - 2² = 19973197 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19973221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9986600 + 9986601.

It is an arithmetic number, because the mean of its divisors is an integer number (9986601).

Almost surely, 2^19973201 is an apocalyptic number.

It is an amenable number.

19973201 is a deficient number, since it is larger than the sum of its proper divisors (1).

19973201 is an equidigital number, since it uses as much as digits as its factorization.

19973201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 19973201 is about 4469.1387313441. The cubic root of 19973201 is about 271.3204680047.

The spelling of 19973201 in words is "nineteen million, nine hundred seventy-three thousand, two hundred one".