86165987 has 2 divisors, whose sum is σ = 86165988. Its totient is φ = 86165986.

The previous prime is 86165983. The next prime is 86166001. The reversal of 86165987 is 78956168.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86165987 - 2² = 86165983 is a prime.

It is not a weakly prime, because it can be changed into another prime (86165983) 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, 43082993 + 43082994.

It is an arithmetic number, because the mean of its divisors is an integer number (43082994).

Almost surely, 2^86165987 is an apocalyptic number.

86165987 is a deficient number, since it is larger than the sum of its proper divisors (1).

86165987 is an equidigital number, since it uses as much as digits as its factorization.

86165987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 50.

The square root of 86165987 is about 9282.5636006440. The cubic root of 86165987 is about 441.6842933672.

The spelling of 86165987 in words is "eighty-six million, one hundred sixty-five thousand, nine hundred eighty-seven".