19490201 has 2 divisors, whose sum is σ = 19490202. Its totient is φ = 19490200.

The previous prime is 19490183. The next prime is 19490209. The reversal of 19490201 is 10209491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18966025 + 524176 = 4355^2 + 724^2 .

It is an emirp because it is prime and its reverse (10209491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19490201 - 2¹⁰ = 19489177 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19490209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9745100 + 9745101.

It is an arithmetic number, because the mean of its divisors is an integer number (9745101).

Almost surely, 2^19490201 is an apocalyptic number.

It is an amenable number.

19490201 is a deficient number, since it is larger than the sum of its proper divisors (1).

19490201 is an equidigital number, since it uses as much as digits as its factorization.

19490201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 19490201 is about 4414.7707754763. The cubic root of 19490201 is about 269.1155374943.

Adding to 19490201 its reverse (10209491), we get a palindrome (29699692).

It can be divided in two parts, 19490 and 201, that added together give a palindrome (19691).

The spelling of 19490201 in words is "nineteen million, four hundred ninety thousand, two hundred one".