8616921077 has 2 divisors, whose sum is σ = 8616921078. Its totient is φ = 8616921076.

The previous prime is 8616921073. The next prime is 8616921133. The reversal of 8616921077 is 7701296168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8485910161 + 131010916 = 92119^2 + 11446^2 .

It is a cyclic number.

It is not a de Polignac number, because 8616921077 - 2² = 8616921073 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8616921073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4308460538 + 4308460539.

It is an arithmetic number, because the mean of its divisors is an integer number (4308460539).

Almost surely, 2^8616921077 is an apocalyptic number.

It is an amenable number.

8616921077 is a deficient number, since it is larger than the sum of its proper divisors (1).

8616921077 is an equidigital number, since it uses as much as digits as its factorization.

8616921077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 8616921077 is about 92827.3724555424. The cubic root of 8616921077 is about 2050.1424510965.

The spelling of 8616921077 in words is "eight billion, six hundred sixteen million, nine hundred twenty-one thousand, seventy-seven".