840963961 has 2 divisors, whose sum is σ = 840963962. Its totient is φ = 840963960.

The previous prime is 840963941. The next prime is 840964013. The reversal of 840963961 is 169369048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 779247225 + 61716736 = 27915^2 + 7856^2 .

It is a cyclic number.

It is not a de Polignac number, because 840963961 - 2¹³ = 840955769 is a prime.

It is not a weakly prime, because it can be changed into another prime (840963931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420481980 + 420481981.

It is an arithmetic number, because the mean of its divisors is an integer number (420481981).

Almost surely, 2^840963961 is an apocalyptic number.

It is an amenable number.

840963961 is a deficient number, since it is larger than the sum of its proper divisors (1).

840963961 is an equidigital number, since it uses as much as digits as its factorization.

840963961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 46.

The square root of 840963961 is about 28999.3786312742. The cubic root of 840963961 is about 943.8995845173.

The spelling of 840963961 in words is "eight hundred forty million, nine hundred sixty-three thousand, nine hundred sixty-one".