86112821 has 2 divisors, whose sum is σ = 86112822. Its totient is φ = 86112820.

The previous prime is 86112811. The next prime is 86112827. The reversal of 86112821 is 12821168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52635025 + 33477796 = 7255^2 + 5786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86112821 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 (86112827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43056410 + 43056411.

It is an arithmetic number, because the mean of its divisors is an integer number (43056411).

Almost surely, 2^86112821 is an apocalyptic number.

It is an amenable number.

86112821 is a deficient number, since it is larger than the sum of its proper divisors (1).

86112821 is an equidigital number, since it uses as much as digits as its factorization.

86112821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 29.

The square root of 86112821 is about 9279.6994024591. The cubic root of 86112821 is about 441.5934322306.

Adding to 86112821 its reverse (12821168), we get a palindrome (98933989).

The spelling of 86112821 in words is "eighty-six million, one hundred twelve thousand, eight hundred twenty-one".