85559389 has 2 divisors, whose sum is σ = 85559390. Its totient is φ = 85559388.

The previous prime is 85559339. The next prime is 85559401. The reversal of 85559389 is 98395558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82210489 + 3348900 = 9067^2 + 1830^2 .

It is a cyclic number.

It is not a de Polignac number, because 85559389 - 2¹¹ = 85557341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85559329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42779694 + 42779695.

It is an arithmetic number, because the mean of its divisors is an integer number (42779695).

Almost surely, 2^85559389 is an apocalyptic number.

It is an amenable number.

85559389 is a deficient number, since it is larger than the sum of its proper divisors (1).

85559389 is an equidigital number, since it uses as much as digits as its factorization.

85559389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944000, while the sum is 52.

The square root of 85559389 is about 9249.8318363092. The cubic root of 85559389 is about 440.6453838230.

The spelling of 85559389 in words is "eighty-five million, five hundred fifty-nine thousand, three hundred eighty-nine".