8109823961 has 2 divisors, whose sum is σ = 8109823962. Its totient is φ = 8109823960.

The previous prime is 8109823933. The next prime is 8109823999. The reversal of 8109823961 is 1693289018.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7626703561 + 483120400 = 87331^2 + 21980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8109823961 is a prime.

It is not a weakly prime, because it can be changed into another prime (8109823861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4054911980 + 4054911981.

It is an arithmetic number, because the mean of its divisors is an integer number (4054911981).

Almost surely, 2^8109823961 is an apocalyptic number.

It is an amenable number.

8109823961 is a deficient number, since it is larger than the sum of its proper divisors (1).

8109823961 is an equidigital number, since it uses as much as digits as its factorization.

8109823961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 8109823961 is about 90054.5610227489. The cubic root of 8109823961 is about 2009.1104337347.

The spelling of 8109823961 in words is "eight billion, one hundred nine million, eight hundred twenty-three thousand, nine hundred sixty-one".