86132821 has 2 divisors, whose sum is σ = 86132822. Its totient is φ = 86132820.

The previous prime is 86132803. The next prime is 86132843. The reversal of 86132821 is 12823168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53802225 + 32330596 = 7335^2 + 5686^2 .

It is a cyclic number.

It is not a de Polignac number, because 86132821 - 2¹¹ = 86130773 is a prime.

It is equal to p_5005759 and since 86132821 and 5005759 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86132881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43066410 + 43066411.

It is an arithmetic number, because the mean of its divisors is an integer number (43066411).

Almost surely, 2^86132821 is an apocalyptic number.

It is an amenable number.

86132821 is a deficient number, since it is larger than the sum of its proper divisors (1).

86132821 is an equidigital number, since it uses as much as digits as its factorization.

86132821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 31.

The square root of 86132821 is about 9280.7769610092. The cubic root of 86132821 is about 441.6276167841.

Adding to 86132821 its reverse (12823168), we get a palindrome (98955989).

The spelling of 86132821 in words is "eighty-six million, one hundred thirty-two thousand, eight hundred twenty-one".