69985 has 4 divisors (see below), whose sum is σ = 83988. Its totient is φ = 55984.

The previous prime is 69959. The next prime is 69991. The reversal of 69985 is 58996.

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 29584 + 40401 = 172^2 + 201^2 .

It is a cyclic number.

It is not a de Polignac number, because 69985 - 2⁷ = 69857 is a prime.

It is a Duffinian number.

69985 is a lucky 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, 6994 + ... + 7003.

It is an arithmetic number, because the mean of its divisors is an integer number (20997).

69985 is a Friedman number, since it can be written as 9-8+9*6^5, using all its digits and the basic arithmetic operations.

2⁶⁹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

69985 is a deficient number, since it is larger than the sum of its proper divisors (14003).

69985 is a wasteful number, since it uses less digits than its factorization.

69985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14002.

The product of its digits is 19440, while the sum is 37.

The square root of 69985 is about 264.5467822522. The cubic root of 69985 is about 41.2099090126.

It can be divided in two parts, 699 and 85, that added together give a square (784 = 28²).

The spelling of 69985 in words is "sixty-nine thousand, nine hundred eighty-five".