85312061 has 2 divisors, whose sum is σ = 85312062. Its totient is φ = 85312060.

The previous prime is 85312057. The next prime is 85312067. The reversal of 85312061 is 16021358.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50324836 + 34987225 = 7094^2 + 5915^2 .

It is a cyclic number.

It is not a de Polignac number, because 85312061 - 2² = 85312057 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85312061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85312067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42656030 + 42656031.

It is an arithmetic number, because the mean of its divisors is an integer number (42656031).

Almost surely, 2^85312061 is an apocalyptic number.

It is an amenable number.

85312061 is a deficient number, since it is larger than the sum of its proper divisors (1).

85312061 is an equidigital number, since it uses as much as digits as its factorization.

85312061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 85312061 is about 9236.4528364519. The cubic root of 85312061 is about 440.2203803034.

The spelling of 85312061 in words is "eighty-five million, three hundred twelve thousand, sixty-one".