85018589 has 2 divisors, whose sum is σ = 85018590. Its totient is φ = 85018588.

The previous prime is 85018579. The next prime is 85018613. The reversal of 85018589 is 98581058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60684100 + 24334489 = 7790^2 + 4933^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85018589 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85018579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42509294 + 42509295.

It is an arithmetic number, because the mean of its divisors is an integer number (42509295).

Almost surely, 2^85018589 is an apocalyptic number.

It is an amenable number.

85018589 is a deficient number, since it is larger than the sum of its proper divisors (1).

85018589 is an equidigital number, since it uses as much as digits as its factorization.

85018589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 115200, while the sum is 44.

The square root of 85018589 is about 9220.5525322510. The cubic root of 85018589 is about 439.7150169058.

The spelling of 85018589 in words is "eighty-five million, eighteen thousand, five hundred eighty-nine".