86423521 has 2 divisors, whose sum is σ = 86423522. Its totient is φ = 86423520.

The previous prime is 86423497. The next prime is 86423537. The reversal of 86423521 is 12532468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81649296 + 4774225 = 9036^2 + 2185^2 .

It is a cyclic number.

It is not a de Polignac number, because 86423521 - 2¹¹ = 86421473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86423591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43211760 + 43211761.

It is an arithmetic number, because the mean of its divisors is an integer number (43211761).

Almost surely, 2^86423521 is an apocalyptic number.

It is an amenable number.

86423521 is a deficient number, since it is larger than the sum of its proper divisors (1).

86423521 is an equidigital number, since it uses as much as digits as its factorization.

86423521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 31.

The square root of 86423521 is about 9296.4251731512. The cubic root of 86423521 is about 442.1238929122.

Adding to 86423521 its reverse (12532468), we get a palindrome (98955989).

The spelling of 86423521 in words is "eighty-six million, four hundred twenty-three thousand, five hundred twenty-one".