8621370077 has 2 divisors, whose sum is σ = 8621370078. Its totient is φ = 8621370076.

The previous prime is 8621370047. The next prime is 8621370091. The reversal of 8621370077 is 7700731268.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8402655556 + 218714521 = 91666^2 + 14789^2 .

It is a cyclic number.

It is not a de Polignac number, because 8621370077 - 2⁶ = 8621370013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8621370047) 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, 4310685038 + 4310685039.

It is an arithmetic number, because the mean of its divisors is an integer number (4310685039).

Almost surely, 2^8621370077 is an apocalyptic number.

It is an amenable number.

8621370077 is a deficient number, since it is larger than the sum of its proper divisors (1).

8621370077 is an equidigital number, since it uses as much as digits as its factorization.

8621370077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 41.

The square root of 8621370077 is about 92851.3331999062. Note that the first 3 decimals coincide. The cubic root of 8621370077 is about 2050.4952265394.

The spelling of 8621370077 in words is "eight billion, six hundred twenty-one million, three hundred seventy thousand, seventy-seven".