769681 has 6 divisors (see below), whose sum is σ = 846146. Its totient is φ = 699600.

The previous prime is 769673. The next prime is 769687. The reversal of 769681 is 186967.

It can be written as a sum of positive squares in only one way, i.e., 576081 + 193600 = 759^2 + 440^2 .

It is not a de Polignac number, because 769681 - 2³ = 769673 is a prime.

It is a super-2 number, since 2×769681² = 1184817683522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 769681.

It is not an unprimeable number, because it can be changed into a prime (769687) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3060 + ... + 3301.

2⁷⁶⁹⁶⁸¹ is an apocalyptic number.

It is an amenable number.

769681 is a deficient number, since it is larger than the sum of its proper divisors (76465).

769681 is a wasteful number, since it uses less digits than its factorization.

769681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6383 (or 6372 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 769681 is about 877.3146527900. The cubic root of 769681 is about 91.6439054599.

It can be divided in two parts, 7696 and 81, that added together give a palindrome (7777).

The spelling of 769681 in words is "seven hundred sixty-nine thousand, six hundred eighty-one".