8608518421 has 2 divisors, whose sum is σ = 8608518422. Its totient is φ = 8608518420.

The previous prime is 8608518409. The next prime is 8608518467. The reversal of 8608518421 is 1248158068.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6640620100 + 1967898321 = 81490^2 + 44361^2 .

It is a cyclic number.

It is not a de Polignac number, because 8608518421 - 2¹⁷ = 8608387349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8608513421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4304259210 + 4304259211.

It is an arithmetic number, because the mean of its divisors is an integer number (4304259211).

Almost surely, 2^8608518421 is an apocalyptic number.

It is an amenable number.

8608518421 is a deficient number, since it is larger than the sum of its proper divisors (1).

8608518421 is an equidigital number, since it uses as much as digits as its factorization.

8608518421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 122880, while the sum is 43.

The square root of 8608518421 is about 92782.1018354294. The cubic root of 8608518421 is about 2049.4758462431.

The spelling of 8608518421 in words is "eight billion, six hundred eight million, five hundred eighteen thousand, four hundred twenty-one".