9979765 has 16 divisors (see below), whose sum is σ = 12787632. Its totient is φ = 7450624.

The previous prime is 9979763. The next prime is 9979771. The reversal of 9979765 is 5679799.

9979765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1347921 + 8631844 = 1161^2 + 2938^2 .

It is not a de Polignac number, because 9979765 - 2¹ = 9979763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9979763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11217 + ... + 12073.

It is an arithmetic number, because the mean of its divisors is an integer number (799227).

Almost surely, 2^9979765 is an apocalyptic number.

It is an amenable number.

9979765 is a deficient number, since it is larger than the sum of its proper divisors (2807867).

9979765 is a wasteful number, since it uses less digits than its factorization.

9979765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016.

The product of its digits is 1071630, while the sum is 52.

The square root of 9979765 is about 3159.0766055922. The cubic root of 9979765 is about 215.2980542570.

The spelling of 9979765 in words is "nine million, nine hundred seventy-nine thousand, seven hundred sixty-five".