72591559 has 2 divisors, whose sum is σ = 72591560. Its totient is φ = 72591558.

The previous prime is 72591527. The next prime is 72591569. The reversal of 72591559 is 95519527.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (95519527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72591559 - 2⁵ = 72591527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72591509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36295779 + 36295780.

It is an arithmetic number, because the mean of its divisors is an integer number (36295780).

Almost surely, 2^72591559 is an apocalyptic number.

72591559 is a deficient number, since it is larger than the sum of its proper divisors (1).

72591559 is an equidigital number, since it uses as much as digits as its factorization.

72591559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141750, while the sum is 43.

The square root of 72591559 is about 8520.0680161604. The cubic root of 72591559 is about 417.1530031812.

The spelling of 72591559 in words is "seventy-two million, five hundred ninety-one thousand, five hundred fifty-nine".