86959009 has 2 divisors, whose sum is σ = 86959010. Its totient is φ = 86959008.

The previous prime is 86958983. The next prime is 86959027. The reversal of 86959009 is 90095968.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68425984 + 18533025 = 8272^2 + 4305^2 .

It is a cyclic number.

It is not a de Polignac number, because 86959009 - 2⁷ = 86958881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86959009.

It is not a weakly prime, because it can be changed into another prime (86959049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43479504 + 43479505.

It is an arithmetic number, because the mean of its divisors is an integer number (43479505).

Almost surely, 2^86959009 is an apocalyptic number.

It is an amenable number.

86959009 is a deficient number, since it is larger than the sum of its proper divisors (1).

86959009 is an equidigital number, since it uses as much as digits as its factorization.

86959009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174960, while the sum is 46.

The square root of 86959009 is about 9325.1814459559. The cubic root of 86959009 is about 443.0351600212.

The spelling of 86959009 in words is "eighty-six million, nine hundred fifty-nine thousand, nine".