969640563 has 4 divisors (see below), whose sum is σ = 1292854088. Its totient is φ = 646427040.

The previous prime is 969640519. The next prime is 969640571. The reversal of 969640563 is 365046969.

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 969640563 - 2⁶ = 969640499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (969640363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 161606758 + ... + 161606763.

It is an arithmetic number, because the mean of its divisors is an integer number (323213522).

Almost surely, 2^969640563 is an apocalyptic number.

969640563 is a deficient number, since it is larger than the sum of its proper divisors (323213525).

969640563 is a wasteful number, since it uses less digits than its factorization.

969640563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323213524.

The product of its (nonzero) digits is 1049760, while the sum is 48.

The square root of 969640563 is about 31139.0520568626. The cubic root of 969640563 is about 989.7760140146.

The spelling of 969640563 in words is "nine hundred sixty-nine million, six hundred forty thousand, five hundred sixty-three".