9987769 has 8 divisors (see below), whose sum is σ = 10963008. Its totient is φ = 9023760.

The previous prime is 9987737. The next prime is 9987793. The reversal of 9987769 is 9677899.

9987769 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9987769 - 2⁵ = 9987737 is a prime.

It is a super-2 number, since 2×9987769² = 199511059194722, which contains 22 as substring.

It is a Duffinian number.

9987769 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9987709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 882 + ... + 4555.

It is an arithmetic number, because the mean of its divisors is an integer number (1370376).

Almost surely, 2^9987769 is an apocalyptic number.

It is an amenable number.

9987769 is a deficient number, since it is larger than the sum of its proper divisors (975239).

9987769 is a wasteful number, since it uses less digits than its factorization.

9987769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5615.

The product of its digits is 1714608, while the sum is 55.

The square root of 9987769 is about 3160.3431775679. The cubic root of 9987769 is about 215.3555968657.

The spelling of 9987769 in words is "nine million, nine hundred eighty-seven thousand, seven hundred sixty-nine".