19441661 has 2 divisors, whose sum is σ = 19441662. Its totient is φ = 19441660.

The previous prime is 19441649. The next prime is 19441673. The reversal of 19441661 is 16614491.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (19441649) and next prime (19441673).

It can be written as a sum of positive squares in only one way, i.e., 19404025 + 37636 = 4405^2 + 194^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19441661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19441361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9720830 + 9720831.

It is an arithmetic number, because the mean of its divisors is an integer number (9720831).

Almost surely, 2^19441661 is an apocalyptic number.

It is an amenable number.

19441661 is a deficient number, since it is larger than the sum of its proper divisors (1).

19441661 is an equidigital number, since it uses as much as digits as its factorization.

19441661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 19441661 is about 4409.2698942115. The cubic root of 19441661 is about 268.8919426137.

It can be divided in two parts, 19441 and 661, that added together give a palindrome (20102).

The spelling of 19441661 in words is "nineteen million, four hundred forty-one thousand, six hundred sixty-one".