9780769 has 4 divisors (see below), whose sum is σ = 9794196. Its totient is φ = 9767344.

The previous prime is 9780761. The next prime is 9780781. The reversal of 9780769 is 9670879.

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 245025 + 9535744 = 495^2 + 3088^2 .

It is a cyclic number.

It is not a de Polignac number, because 9780769 - 2³ = 9780761 is a prime.

It is a super-2 number, since 2×9780769² = 191326884462722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9780761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5554 + ... + 7099.

It is an arithmetic number, because the mean of its divisors is an integer number (2448549).

Almost surely, 2^9780769 is an apocalyptic number.

It is an amenable number.

9780769 is a deficient number, since it is larger than the sum of its proper divisors (13427).

9780769 is a wasteful number, since it uses less digits than its factorization.

9780769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13426.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 9780769 is about 3127.4221013480. The cubic root of 9780769 is about 213.8574253401.

The spelling of 9780769 in words is "nine million, seven hundred eighty thousand, seven hundred sixty-nine".