72579841 has 2 divisors, whose sum is σ = 72579842. Its totient is φ = 72579840.

The previous prime is 72579839. The next prime is 72579869. The reversal of 72579841 is 14897527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50112241 + 22467600 = 7079^2 + 4740^2 .

It is an emirp because it is prime and its reverse (14897527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72579841 - 2¹ = 72579839 is a prime.

Together with 72579839, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72579041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36289920 + 36289921.

It is an arithmetic number, because the mean of its divisors is an integer number (36289921).

Almost surely, 2^72579841 is an apocalyptic number.

It is an amenable number.

72579841 is a deficient number, since it is larger than the sum of its proper divisors (1).

72579841 is an equidigital number, since it uses as much as digits as its factorization.

72579841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 43.

The square root of 72579841 is about 8519.3803178400. The cubic root of 72579841 is about 417.1305558425.

The spelling of 72579841 in words is "seventy-two million, five hundred seventy-nine thousand, eight hundred forty-one".