85491061 has 2 divisors, whose sum is σ = 85491062. Its totient is φ = 85491060.

The previous prime is 85491037. The next prime is 85491139. The reversal of 85491061 is 16019458.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59582961 + 25908100 = 7719^2 + 5090^2 .

It is a cyclic number.

It is not a de Polignac number, because 85491061 - 2¹⁹ = 84966773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85491361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42745530 + 42745531.

It is an arithmetic number, because the mean of its divisors is an integer number (42745531).

Almost surely, 2^85491061 is an apocalyptic number.

It is an amenable number.

85491061 is a deficient number, since it is larger than the sum of its proper divisors (1).

85491061 is an equidigital number, since it uses as much as digits as its factorization.

85491061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 85491061 is about 9246.1376260577. The cubic root of 85491061 is about 440.5280523157.

The spelling of 85491061 in words is "eighty-five million, four hundred ninety-one thousand, sixty-one".