72204641 has 2 divisors, whose sum is σ = 72204642. Its totient is φ = 72204640.

The previous prime is 72204623. The next prime is 72204647. The reversal of 72204641 is 14640227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38390416 + 33814225 = 6196^2 + 5815^2 .

It is a cyclic number.

It is not a de Polignac number, because 72204641 - 2¹⁴ = 72188257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72204641.

It is not a weakly prime, because it can be changed into another prime (72204647) 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 as a sum of consecutive naturals, namely, 36102320 + 36102321.

It is an arithmetic number, because the mean of its divisors is an integer number (36102321).

Almost surely, 2^72204641 is an apocalyptic number.

It is an amenable number.

72204641 is a deficient number, since it is larger than the sum of its proper divisors (1).

72204641 is an equidigital number, since it uses as much as digits as its factorization.

72204641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 72204641 is about 8497.3314046235. The cubic root of 72204641 is about 416.4105310770.

Adding to 72204641 its reverse (14640227), we get a palindrome (86844868).

The spelling of 72204641 in words is "seventy-two million, two hundred four thousand, six hundred forty-one".