72456539 has 2 divisors, whose sum is σ = 72456540. Its totient is φ = 72456538.

The previous prime is 72456523. The next prime is 72456569. The reversal of 72456539 is 93565427.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72456539 - 2⁴ = 72456523 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72456496 and 72456505.

It is not a weakly prime, because it can be changed into another prime (72456569) 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, 36228269 + 36228270.

It is an arithmetic number, because the mean of its divisors is an integer number (36228270).

Almost surely, 2^72456539 is an apocalyptic number.

72456539 is a deficient number, since it is larger than the sum of its proper divisors (1).

72456539 is an equidigital number, since it uses as much as digits as its factorization.

72456539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 41.

The square root of 72456539 is about 8512.1406825780. The cubic root of 72456539 is about 416.8942083746.

The spelling of 72456539 in words is "seventy-two million, four hundred fifty-six thousand, five hundred thirty-nine".