769985 has 4 divisors (see below), whose sum is σ = 923988. Its totient is φ = 615984.

The previous prime is 769973. The next prime is 769987. The reversal of 769985 is 589967.

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 446224 + 323761 = 668^2 + 569^2 .

It is a cyclic number.

It is not a de Polignac number, because 769985 - 2⁸ = 769729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (769987) 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 in 3 ways as a sum of consecutive naturals, for example, 76994 + ... + 77003.

It is an arithmetic number, because the mean of its divisors is an integer number (230997).

2⁷⁶⁹⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

769985 is a deficient number, since it is larger than the sum of its proper divisors (154003).

769985 is a wasteful number, since it uses less digits than its factorization.

769985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154002.

The product of its digits is 136080, while the sum is 44.

The square root of 769985 is about 877.4878916544. The cubic root of 769985 is about 91.6559693669.

The spelling of 769985 in words is "seven hundred sixty-nine thousand, nine hundred eighty-five".