961563 has 4 divisors (see below), whose sum is σ = 1282088. Its totient is φ = 641040.

The previous prime is 961549. The next prime is 961567. The reversal of 961563 is 365169.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 961563 - 2⁴ = 961547 is a prime.

It is a D-number.

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 961563.

It is not an unprimeable number, because it can be changed into a prime (961567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160258 + ... + 160263.

It is an arithmetic number, because the mean of its divisors is an integer number (320522).

2⁹⁶¹⁵⁶³ is an apocalyptic number.

961563 is a deficient number, since it is larger than the sum of its proper divisors (320525).

961563 is a wasteful number, since it uses less digits than its factorization.

961563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320524.

The product of its digits is 4860, while the sum is 30.

The square root of 961563 is about 980.5931878205. The cubic root of 961563 is about 98.7019912981.

The spelling of 961563 in words is "nine hundred sixty-one thousand, five hundred sixty-three".