960991 has 2 divisors, whose sum is σ = 960992. Its totient is φ = 960990.

The previous prime is 960989. The next prime is 961003. The reversal of 960991 is 199069.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 960991 - 2¹ = 960989 is a prime.

Together with 960989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (960931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480495 + 480496.

It is an arithmetic number, because the mean of its divisors is an integer number (480496).

2⁹⁶⁰⁹⁹¹ is an apocalyptic number.

960991 is a deficient number, since it is larger than the sum of its proper divisors (1).

960991 is an equidigital number, since it uses as much as digits as its factorization.

960991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 960991 is about 980.3014842384. The cubic root of 960991 is about 98.6824159686.

It can be divided in two parts, 96099 and 1, that added together give a square (96100 = 310²).

The spelling of 960991 in words is "nine hundred sixty thousand, nine hundred ninety-one".