9980775 has 36 divisors (see below), whose sum is σ = 20433712. Its totient is φ = 4561920.

The previous prime is 9980771. The next prime is 9980777. The reversal of 9980775 is 5770899.

9980775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9980775 - 2² = 9980771 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9980775.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9980771) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1594 + ... + 4743.

Almost surely, 2^9980775 is an apocalyptic number.

9980775 is an abundant number, since it is smaller than the sum of its proper divisors (10452937).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9980775 is a wasteful number, since it uses less digits than its factorization.

9980775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6360 (or 6352 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 9980775 is about 3159.2364583867. The cubic root of 9980775 is about 215.3053170766.

The spelling of 9980775 in words is "nine million, nine hundred eighty thousand, seven hundred seventy-five".