85611061 has 2 divisors, whose sum is σ = 85611062. Its totient is φ = 85611060.

The previous prime is 85611049. The next prime is 85611067. The reversal of 85611061 is 16011658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44970436 + 40640625 = 6706^2 + 6375^2 .

It is a cyclic number.

It is not a de Polignac number, because 85611061 - 2¹⁵ = 85578293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85611067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42805530 + 42805531.

It is an arithmetic number, because the mean of its divisors is an integer number (42805531).

Almost surely, 2^85611061 is an apocalyptic number.

It is an amenable number.

85611061 is a deficient number, since it is larger than the sum of its proper divisors (1).

85611061 is an equidigital number, since it uses as much as digits as its factorization.

85611061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 85611061 is about 9252.6245465814. The cubic root of 85611061 is about 440.7340724966.

The spelling of 85611061 in words is "eighty-five million, six hundred eleven thousand, sixty-one".