8469897181 has 2 divisors, whose sum is σ = 8469897182. Its totient is φ = 8469897180.

The previous prime is 8469897169. The next prime is 8469897187. The reversal of 8469897181 is 1817989648.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7226700100 + 1243197081 = 85010^2 + 35259^2 .

It is a cyclic number.

It is not a de Polignac number, because 8469897181 - 2⁷ = 8469897053 is a prime.

It is a super-2 number, since 2×8469897181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8469897187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4234948590 + 4234948591.

It is an arithmetic number, because the mean of its divisors is an integer number (4234948591).

Almost surely, 2^8469897181 is an apocalyptic number.

It is an amenable number.

8469897181 is a deficient number, since it is larger than the sum of its proper divisors (1).

8469897181 is an equidigital number, since it uses as much as digits as its factorization.

8469897181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 61.

The square root of 8469897181 is about 92032.0443160968. The cubic root of 8469897181 is about 2038.4154988336.

The spelling of 8469897181 in words is "eight billion, four hundred sixty-nine million, eight hundred ninety-seven thousand, one hundred eighty-one".