9983561 has 4 divisors (see below), whose sum is σ = 11409792. Its totient is φ = 8557332.

The previous prime is 9983551. The next prime is 9983579. The reversal of 9983561 is 1653899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9983561 - 2⁶ = 9983497 is a prime.

It is a d-powerful number, because it can be written as 9⁵ + 9⁷ + 8³ + 3¹⁴ + 5⁷ + 6⁷ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9983551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713105 + ... + 713118.

It is an arithmetic number, because the mean of its divisors is an integer number (2852448).

Almost surely, 2^9983561 is an apocalyptic number.

It is an amenable number.

9983561 is a deficient number, since it is larger than the sum of its proper divisors (1426231).

9983561 is a wasteful number, since it uses less digits than its factorization.

9983561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426230.

The product of its digits is 58320, while the sum is 41.

The square root of 9983561 is about 3159.6773569464. The cubic root of 9983561 is about 215.3253484138.

The spelling of 9983561 in words is "nine million, nine hundred eighty-three thousand, five hundred sixty-one".