86439233 has 2 divisors, whose sum is σ = 86439234. Its totient is φ = 86439232.

The previous prime is 86439211. The next prime is 86439239. The reversal of 86439233 is 33293468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86341264 + 97969 = 9292^2 + 313^2 .

It is a cyclic number.

It is not a de Polignac number, because 86439233 - 2¹² = 86435137 is a prime.

It is not a weakly prime, because it can be changed into another prime (86439239) 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, 43219616 + 43219617.

It is an arithmetic number, because the mean of its divisors is an integer number (43219617).

Almost surely, 2^86439233 is an apocalyptic number.

It is an amenable number.

86439233 is a deficient number, since it is larger than the sum of its proper divisors (1).

86439233 is an equidigital number, since it uses as much as digits as its factorization.

86439233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 38.

The square root of 86439233 is about 9297.2701907603. The cubic root of 86439233 is about 442.1506843443.

The spelling of 86439233 in words is "eighty-six million, four hundred thirty-nine thousand, two hundred thirty-three".