1065647161 has 2 divisors, whose sum is σ = 1065647162. Its totient is φ = 1065647160.

The previous prime is 1065647147. The next prime is 1065647179. The reversal of 1065647161 is 1617465601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1035616761 + 30030400 = 32181^2 + 5480^2 .

It is an emirp because it is prime and its reverse (1617465601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1065647161 - 2¹³ = 1065638969 is a prime.

It is a super-2 number, since 2×1065647161² = 2271207743494719842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1065647161.

It is not a weakly prime, because it can be changed into another prime (1065647461) 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, 532823580 + 532823581.

It is an arithmetic number, because the mean of its divisors is an integer number (532823581).

Almost surely, 2^1065647161 is an apocalyptic number.

It is an amenable number.

1065647161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1065647161 is an equidigital number, since it uses as much as digits as its factorization.

1065647161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 1065647161 is about 32644.2515766559. The cubic root of 1065647161 is about 1021.4202824223.

The spelling of 1065647161 in words is "one billion, sixty-five million, six hundred forty-seven thousand, one hundred sixty-one".