85558489 has 2 divisors, whose sum is σ = 85558490. Its totient is φ = 85558488.

The previous prime is 85558453. The next prime is 85558507. The reversal of 85558489 is 98485558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79798489 + 5760000 = 8933^2 + 2400^2 .

It is a cyclic number.

It is not a de Polignac number, because 85558489 - 2¹¹ = 85556441 is a prime.

It is not a weakly prime, because it can be changed into another prime (85558789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42779244 + 42779245.

It is an arithmetic number, because the mean of its divisors is an integer number (42779245).

Almost surely, 2^85558489 is an apocalyptic number.

It is an amenable number.

85558489 is a deficient number, since it is larger than the sum of its proper divisors (1).

85558489 is an equidigital number, since it uses as much as digits as its factorization.

85558489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304000, while the sum is 52.

The square root of 85558489 is about 9249.7831866482. The cubic root of 85558489 is about 440.6438387667.

The spelling of 85558489 in words is "eighty-five million, five hundred fifty-eight thousand, four hundred eighty-nine".