959921 has 2 divisors, whose sum is σ = 959922. Its totient is φ = 959920.

The previous prime is 959911. The next prime is 959927. The reversal of 959921 is 129959.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 929296 + 30625 = 964^2 + 175^2 .

It is an emirp because it is prime and its reverse (129959) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 959921 - 2¹⁰ = 958897 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (959927) 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 as a sum of consecutive naturals, namely, 479960 + 479961.

It is an arithmetic number, because the mean of its divisors is an integer number (479961).

2⁹⁵⁹⁹²¹ is an apocalyptic number.

It is an amenable number.

959921 is a deficient number, since it is larger than the sum of its proper divisors (1).

959921 is an equidigital number, since it uses as much as digits as its factorization.

959921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7290, while the sum is 35.

The square root of 959921 is about 979.7555817652. The cubic root of 959921 is about 98.6457769163.

The spelling of 959921 in words is "nine hundred fifty-nine thousand, nine hundred twenty-one".