72371441 has 2 divisors, whose sum is σ = 72371442. Its totient is φ = 72371440.

The previous prime is 72371419. The next prime is 72371461. The reversal of 72371441 is 14417327.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71910400 + 461041 = 8480^2 + 679^2 .

It is an emirp because it is prime and its reverse (14417327) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72371441 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (72371401) 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, 36185720 + 36185721.

It is an arithmetic number, because the mean of its divisors is an integer number (36185721).

Almost surely, 2^72371441 is an apocalyptic number.

It is an amenable number.

72371441 is a deficient number, since it is larger than the sum of its proper divisors (1).

72371441 is an equidigital number, since it uses as much as digits as its factorization.

72371441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 29.

The square root of 72371441 is about 8507.1405889406. The cubic root of 72371441 is about 416.7309345844.

Adding to 72371441 its reverse (14417327), we get a palindrome (86788768).

The spelling of 72371441 in words is "seventy-two million, three hundred seventy-one thousand, four hundred forty-one".