86733509 has 2 divisors, whose sum is σ = 86733510. Its totient is φ = 86733508.

The previous prime is 86733503. The next prime is 86733511. The reversal of 86733509 is 90533768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76073284 + 10660225 = 8722^2 + 3265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86733509 is a prime.

Together with 86733511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86733503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43366754 + 43366755.

It is an arithmetic number, because the mean of its divisors is an integer number (43366755).

Almost surely, 2^86733509 is an apocalyptic number.

It is an amenable number.

86733509 is a deficient number, since it is larger than the sum of its proper divisors (1).

86733509 is an equidigital number, since it uses as much as digits as its factorization.

86733509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 86733509 is about 9313.0826797575. The cubic root of 86733509 is about 442.6518724970.

The spelling of 86733509 in words is "eighty-six million, seven hundred thirty-three thousand, five hundred nine".