873211961 has 2 divisors, whose sum is σ = 873211962. Its totient is φ = 873211960.

The previous prime is 873211957. The next prime is 873211979. The reversal of 873211961 is 169112378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 762036025 + 111175936 = 27605^2 + 10544^2 .

It is a cyclic number.

It is not a de Polignac number, because 873211961 - 2² = 873211957 is a prime.

It is not a weakly prime, because it can be changed into another prime (873211901) 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, 436605980 + 436605981.

It is an arithmetic number, because the mean of its divisors is an integer number (436605981).

Almost surely, 2^873211961 is an apocalyptic number.

It is an amenable number.

873211961 is a deficient number, since it is larger than the sum of its proper divisors (1).

873211961 is an equidigital number, since it uses as much as digits as its factorization.

873211961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 38.

The square root of 873211961 is about 29550.1600841687. The cubic root of 873211961 is about 955.8136431888.

The spelling of 873211961 in words is "eight hundred seventy-three million, two hundred eleven thousand, nine hundred sixty-one".