86997685 has 4 divisors (see below), whose sum is σ = 104397228. Its totient is φ = 69598144.

The previous prime is 86997679. The next prime is 86997689. The reversal of 86997685 is 58679968.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32695524 + 54302161 = 5718^2 + 7369^2 .

It is a cyclic number.

It is not a de Polignac number, because 86997685 - 2⁹ = 86997173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86997689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8699764 + ... + 8699773.

It is an arithmetic number, because the mean of its divisors is an integer number (26099307).

Almost surely, 2^86997685 is an apocalyptic number.

It is an amenable number.

86997685 is a deficient number, since it is larger than the sum of its proper divisors (17399543).

86997685 is a wasteful number, since it uses less digits than its factorization.

86997685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17399542.

The product of its digits is 6531840, while the sum is 58.

The square root of 86997685 is about 9327.2549552374. The cubic root of 86997685 is about 443.1008319141.

It can be divided in two parts, 8699 and 7685, that added together give a 14-th power (16384 = 2¹⁴).

The spelling of 86997685 in words is "eighty-six million, nine hundred ninety-seven thousand, six hundred eighty-five".