8604227381 has 2 divisors, whose sum is σ = 8604227382. Its totient is φ = 8604227380.

The previous prime is 8604227369. The next prime is 8604227393. The reversal of 8604227381 is 1837224068.

8604227381 = 65590² + 65591².

It is a balanced prime because it is at equal distance from previous prime (8604227369) and next prime (8604227393).

It can be written as a sum of positive squares in only one way, i.e., 4302179281 + 4302048100 = 65591^2 + 65590^2 .

It is a cyclic number.

It is not a de Polignac number, because 8604227381 - 2²² = 8600033077 is a prime.

It is a super-2 number, since 2×8604227381² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8604220381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4302113690 + 4302113691.

It is an arithmetic number, because the mean of its divisors is an integer number (4302113691).

Almost surely, 2^8604227381 is an apocalyptic number.

8604227381 is the 65591-st centered square number.

It is an amenable number.

8604227381 is a deficient number, since it is larger than the sum of its proper divisors (1).

8604227381 is an equidigital number, since it uses as much as digits as its factorization.

8604227381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 8604227381 is about 92758.9746655276. The cubic root of 8604227381 is about 2049.1352593950.

The spelling of 8604227381 in words is "eight billion, six hundred four million, two hundred twenty-seven thousand, three hundred eighty-one".