654161161 has 2 divisors, whose sum is σ = 654161162. Its totient is φ = 654161160.

The previous prime is 654161141. The next prime is 654161197. The reversal of 654161161 is 161161456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 422055936 + 232105225 = 20544^2 + 15235^2 .

It is a cyclic number.

It is not a de Polignac number, because 654161161 - 2⁹ = 654160649 is a prime.

It is a super-3 number, since 3×654161161³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (654161141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327080580 + 327080581.

It is an arithmetic number, because the mean of its divisors is an integer number (327080581).

Almost surely, 2^654161161 is an apocalyptic number.

It is an amenable number.

654161161 is a deficient number, since it is larger than the sum of its proper divisors (1).

654161161 is an equidigital number, since it uses as much as digits as its factorization.

654161161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 31.

The square root of 654161161 is about 25576.5744578902. The cubic root of 654161161 is about 868.0836672626.

The spelling of 654161161 in words is "six hundred fifty-four million, one hundred sixty-one thousand, one hundred sixty-one".