9840769 has 3 divisors (see below), whose sum is σ = 9843907. Its totient is φ = 9837632.

The previous prime is 9840763. The next prime is 9840781. The reversal of 9840769 is 9670489.

The square root of 9840769 is 3137.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9670489 = 1187 ⋅8147.

It can be written as a sum of positive squares in only one way, i.e., 9828225 + 12544 = 3135^2 + 112^2 .

It is a de Polignac number, because none of the positive numbers 2^k-9840769 is a prime.

It is a super-2 number, since 2×9840769² = 193681469022722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9840763) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1569 + ... + 4705.

Almost surely, 2^9840769 is an apocalyptic number.

9840769 is the 3137-th square number.

9840769 is the 1569-th centered octagonal number.

It is an amenable number.

9840769 is a deficient number, since it is larger than the sum of its proper divisors (3138).

9840769 is an frugal number, since it uses more digits than its factorization.

9840769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6274 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The cubic root of 9840769 is about 214.2938360308.

It can be divided in two parts, 9840 and 769, that added together give a square (10609 = 103²).

The spelling of 9840769 in words is "nine million, eight hundred forty thousand, seven hundred sixty-nine".