207985 has 4 divisors (see below), whose sum is σ = 249588. Its totient is φ = 166384.

The previous prime is 207973. The next prime is 207997. The reversal of 207985 is 589702.

207985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (207973) and next prime (207997).

It can be written as a sum of positive squares in 2 ways, for example, as 71824 + 136161 = 268^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 207985 - 2⁵ = 207953 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20794 + ... + 20803.

It is an arithmetic number, because the mean of its divisors is an integer number (62397).

2²⁰⁷⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

207985 is a deficient number, since it is larger than the sum of its proper divisors (41603).

207985 is an equidigital number, since it uses as much as digits as its factorization.

207985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41602.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 207985 is about 456.0537249053. The cubic root of 207985 is about 59.2484970570.

It can be divided in two parts, 2079 and 85, that multiplied together give a triangular number (176715 = T₅₉₄).

The spelling of 207985 in words is "two hundred seven thousand, nine hundred eighty-five".