8472912181 has 2 divisors, whose sum is σ = 8472912182. Its totient is φ = 8472912180.

The previous prime is 8472912137. The next prime is 8472912209. The reversal of 8472912181 is 1812192748.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6314845156 + 2158067025 = 79466^2 + 46455^2 .

It is a cyclic number.

It is not a de Polignac number, because 8472912181 - 2⁷ = 8472912053 is a prime.

It is a super-2 number, since 2×8472912181² (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 (8472912121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4236456090 + 4236456091.

It is an arithmetic number, because the mean of its divisors is an integer number (4236456091).

Almost surely, 2^8472912181 is an apocalyptic number.

It is an amenable number.

8472912181 is a deficient number, since it is larger than the sum of its proper divisors (1).

8472912181 is an equidigital number, since it uses as much as digits as its factorization.

8472912181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 43.

The square root of 8472912181 is about 92048.4230228851. The cubic root of 8472912181 is about 2038.6573393780.

The spelling of 8472912181 in words is "eight billion, four hundred seventy-two million, nine hundred twelve thousand, one hundred eighty-one".