966911821 has 2 divisors, whose sum is σ = 966911822. Its totient is φ = 966911820.

The previous prime is 966911719. The next prime is 966911837. The reversal of 966911821 is 128119669.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 929396196 + 37515625 = 30486^2 + 6125^2 .

It is an emirp because it is prime and its reverse (128119669) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 966911821 - 2¹⁹ = 966387533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (966911021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 483455910 + 483455911.

It is an arithmetic number, because the mean of its divisors is an integer number (483455911).

Almost surely, 2^966911821 is an apocalyptic number.

It is an amenable number.

966911821 is a deficient number, since it is larger than the sum of its proper divisors (1).

966911821 is an equidigital number, since it uses as much as digits as its factorization.

966911821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 43.

The square root of 966911821 is about 31095.2057558718. The cubic root of 966911821 is about 988.8466727708.

The spelling of 966911821 in words is "nine hundred sixty-six million, nine hundred eleven thousand, eight hundred twenty-one".