85238089 has 2 divisors, whose sum is σ = 85238090. Its totient is φ = 85238088.

The previous prime is 85238081. The next prime is 85238093. The reversal of 85238089 is 98083258.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82210489 + 3027600 = 9067^2 + 1740^2 .

It is a cyclic number.

It is not a de Polignac number, because 85238089 - 2³ = 85238081 is a prime.

It is not a weakly prime, because it can be changed into another prime (85238081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42619044 + 42619045.

It is an arithmetic number, because the mean of its divisors is an integer number (42619045).

Almost surely, 2^85238089 is an apocalyptic number.

It is an amenable number.

85238089 is a deficient number, since it is larger than the sum of its proper divisors (1).

85238089 is an equidigital number, since it uses as much as digits as its factorization.

85238089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 85238089 is about 9232.4476169649. The cubic root of 85238089 is about 440.0931087393.

The spelling of 85238089 in words is "eighty-five million, two hundred thirty-eight thousand, eighty-nine".