965920643 has 4 divisors (see below), whose sum is σ = 965987568. Its totient is φ = 965853720.

The previous prime is 965920633. The next prime is 965920691. The reversal of 965920643 is 346029569.

965920643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-965920643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 965920594 and 965920603.

It is not an unprimeable number, because it can be changed into a prime (965920633) 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, 1871 + ... + 43992.

It is an arithmetic number, because the mean of its divisors is an integer number (241496892).

Almost surely, 2^965920643 is an apocalyptic number.

965920643 is a deficient number, since it is larger than the sum of its proper divisors (66925).

965920643 is a wasteful number, since it uses less digits than its factorization.

965920643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66924.

The product of its (nonzero) digits is 349920, while the sum is 44.

The square root of 965920643 is about 31079.2638748089. The cubic root of 965920643 is about 988.5086694686.

The spelling of 965920643 in words is "nine hundred sixty-five million, nine hundred twenty thousand, six hundred forty-three".