959964821 has 2 divisors, whose sum is σ = 959964822. Its totient is φ = 959964820.

The previous prime is 959964799. The next prime is 959964827. The reversal of 959964821 is 128469959.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 653364721 + 306600100 = 25561^2 + 17510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-959964821 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (959964827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 479982410 + 479982411.

It is an arithmetic number, because the mean of its divisors is an integer number (479982411).

Almost surely, 2^959964821 is an apocalyptic number.

It is an amenable number.

959964821 is a deficient number, since it is larger than the sum of its proper divisors (1).

959964821 is an equidigital number, since it uses as much as digits as its factorization.

959964821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1399680, while the sum is 53.

The square root of 959964821 is about 30983.2990657870. The cubic root of 959964821 is about 986.4727797413.

The spelling of 959964821 in words is "nine hundred fifty-nine million, nine hundred sixty-four thousand, eight hundred twenty-one".