86512061 has 2 divisors, whose sum is σ = 86512062. Its totient is φ = 86512060.

The previous prime is 86512003. The next prime is 86512067. The reversal of 86512061 is 16021568.

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., 74822500 + 11689561 = 8650^2 + 3419^2 .

It is a cyclic number.

It is not a de Polignac number, because 86512061 - 2¹⁰ = 86511037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86512067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43256030 + 43256031.

It is an arithmetic number, because the mean of its divisors is an integer number (43256031).

Almost surely, 2^86512061 is an apocalyptic number.

It is an amenable number.

86512061 is a deficient number, since it is larger than the sum of its proper divisors (1).

86512061 is an equidigital number, since it uses as much as digits as its factorization.

86512061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 86512061 is about 9301.1859996454. The cubic root of 86512061 is about 442.2748251605.

The spelling of 86512061 in words is "eighty-six million, five hundred twelve thousand, sixty-one".