8642313949 has 2 divisors, whose sum is σ = 8642313950. Its totient is φ = 8642313948.

The previous prime is 8642313937. The next prime is 8642314007. The reversal of 8642313949 is 9493132468.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4794593049 + 3847720900 = 69243^2 + 62030^2 .

It is a cyclic number.

It is not a de Polignac number, because 8642313949 - 2⁷ = 8642313821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8642317949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4321156974 + 4321156975.

It is an arithmetic number, because the mean of its divisors is an integer number (4321156975).

Almost surely, 2^8642313949 is an apocalyptic number.

It is an amenable number.

8642313949 is a deficient number, since it is larger than the sum of its proper divisors (1).

8642313949 is an equidigital number, since it uses as much as digits as its factorization.

8642313949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1119744, while the sum is 49.

The square root of 8642313949 is about 92964.0465395090. The cubic root of 8642313949 is about 2052.1543047134.

The spelling of 8642313949 in words is "eight billion, six hundred forty-two million, three hundred thirteen thousand, nine hundred forty-nine".