961035821 has 2 divisors, whose sum is σ = 961035822. Its totient is φ = 961035820.

The previous prime is 961035809. The next prime is 961035833. The reversal of 961035821 is 128530169.

961035821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (961035809) and next prime (961035833).

It can be written as a sum of positive squares in only one way, i.e., 661261225 + 299774596 = 25715^2 + 17314^2 .

It is an emirp because it is prime and its reverse (128530169) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 961035821 - 2¹⁸ = 960773677 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 (961035851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480517910 + 480517911.

It is an arithmetic number, because the mean of its divisors is an integer number (480517911).

Almost surely, 2^961035821 is an apocalyptic number.

It is an amenable number.

961035821 is a deficient number, since it is larger than the sum of its proper divisors (1).

961035821 is an equidigital number, since it uses as much as digits as its factorization.

961035821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 961035821 is about 31000.5777526807. The cubic root of 961035821 is about 986.8395014039.

The spelling of 961035821 in words is "nine hundred sixty-one million, thirty-five thousand, eight hundred twenty-one".