765980869 has 4 divisors (see below), whose sum is σ = 773564940. Its totient is φ = 758396800.

The previous prime is 765980833. The next prime is 765980879. The reversal of 765980869 is 968089567.

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 670136769 + 95844100 = 25887^2 + 9790^2 .

It is a cyclic number.

It is not a de Polignac number, because 765980869 - 2²⁷ = 631763141 is a prime.

It is a super-2 number, since 2×765980869² = 1173453383347990322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (765980879) 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, 3791884 + ... + 3792085.

It is an arithmetic number, because the mean of its divisors is an integer number (193391235).

Almost surely, 2^765980869 is an apocalyptic number.

It is an amenable number.

765980869 is a deficient number, since it is larger than the sum of its proper divisors (7584071).

765980869 is a wasteful number, since it uses less digits than its factorization.

765980869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7584070.

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

The square root of 765980869 is about 27676.3593884745. The cubic root of 765980869 is about 914.9681452475.

The spelling of 765980869 in words is "seven hundred sixty-five million, nine hundred eighty thousand, eight hundred sixty-nine".