85355089 has 2 divisors, whose sum is σ = 85355090. Its totient is φ = 85355088.

The previous prime is 85355063. The next prime is 85355107. The reversal of 85355089 is 98055358.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56550400 + 28804689 = 7520^2 + 5367^2 .

It is a cyclic number.

It is not a de Polignac number, because 85355089 - 2¹⁷ = 85224017 is a prime.

It is not a weakly prime, because it can be changed into another prime (85355009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42677544 + 42677545.

It is an arithmetic number, because the mean of its divisors is an integer number (42677545).

Almost surely, 2^85355089 is an apocalyptic number.

It is an amenable number.

85355089 is a deficient number, since it is larger than the sum of its proper divisors (1).

85355089 is an equidigital number, since it uses as much as digits as its factorization.

85355089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 85355089 is about 9238.7817919897. The cubic root of 85355089 is about 440.2943777300.

It can be divided in two parts, 85 and 355089, that multiplied together give a triangular number (30182565 = T₇₇₆₉).

The spelling of 85355089 in words is "eighty-five million, three hundred fifty-five thousand, eighty-nine".