9780975 has 36 divisors (see below), whose sum is σ = 18135000. Its totient is φ = 5033280.

The previous prime is 9780973. The next prime is 9780989. The reversal of 9780975 is 5790879.

It is not a de Polignac number, because 9780975 - 2¹ = 9780973 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 9780975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9780971) 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, 5776 + ... + 7274.

It is an arithmetic number, because the mean of its divisors is an integer number (503750).

Almost surely, 2^9780975 is an apocalyptic number.

9780975 is a deficient number, since it is larger than the sum of its proper divisors (8354025).

9780975 is a wasteful number, since it uses less digits than its factorization.

9780975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544 (or 1536 counting only the distinct ones).

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

The square root of 9780975 is about 3127.4550356480. The cubic root of 9780975 is about 213.8589267326.

The spelling of 9780975 in words is "nine million, seven hundred eighty thousand, nine hundred seventy-five".