72815459 has 2 divisors, whose sum is σ = 72815460. Its totient is φ = 72815458.

The previous prime is 72815443. The next prime is 72815473. The reversal of 72815459 is 95451827.

It is a strong prime.

It is an emirp because it is prime and its reverse (95451827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72815459 - 2⁴ = 72815443 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72815489) 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, 36407729 + 36407730.

It is an arithmetic number, because the mean of its divisors is an integer number (36407730).

Almost surely, 2^72815459 is an apocalyptic number.

72815459 is a deficient number, since it is larger than the sum of its proper divisors (1).

72815459 is an equidigital number, since it uses as much as digits as its factorization.

72815459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 41.

The square root of 72815459 is about 8533.1974663663. The cubic root of 72815459 is about 417.5814492030.

The spelling of 72815459 in words is "seventy-two million, eight hundred fifteen thousand, four hundred fifty-nine".