963561 has 4 divisors (see below), whose sum is σ = 1284752. Its totient is φ = 642372.

The previous prime is 963559. The next prime is 963581. The reversal of 963561 is 165369.

It is a happy number.

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 963561 - 2¹ = 963559 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (963581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160591 + ... + 160596.

It is an arithmetic number, because the mean of its divisors is an integer number (321188).

2⁹⁶³⁵⁶¹ is an apocalyptic number.

It is an amenable number.

963561 is a deficient number, since it is larger than the sum of its proper divisors (321191).

963561 is a wasteful number, since it uses less digits than its factorization.

963561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321190.

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

The square root of 963561 is about 981.6114302513. The cubic root of 963561 is about 98.7703072054.

The spelling of 963561 in words is "nine hundred sixty-three thousand, five hundred sixty-one".