72855089 has 2 divisors, whose sum is σ = 72855090. Its totient is φ = 72855088.

The previous prime is 72855067. The next prime is 72855103. The reversal of 72855089 is 98055827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58262689 + 14592400 = 7633^2 + 3820^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72855089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72855049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36427544 + 36427545.

It is an arithmetic number, because the mean of its divisors is an integer number (36427545).

Almost surely, 2^72855089 is an apocalyptic number.

It is an amenable number.

72855089 is a deficient number, since it is larger than the sum of its proper divisors (1).

72855089 is an equidigital number, since it uses as much as digits as its factorization.

72855089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 72855089 is about 8535.5192577839. The cubic root of 72855089 is about 417.6571920545.

The spelling of 72855089 in words is "seventy-two million, eight hundred fifty-five thousand, eighty-nine".