1669163141 has 2 divisors, whose sum is σ = 1669163142. Its totient is φ = 1669163140.

The previous prime is 1669163087. The next prime is 1669163147. The reversal of 1669163141 is 1413619661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1414888225 + 254274916 = 37615^2 + 15946^2 .

It is an emirp because it is prime and its reverse (1413619661) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1669163141 is a prime.

It is a super-2 number, since 2×1669163141² = 5572211182545971762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1669163095 and 1669163104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1669163147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834581570 + 834581571.

It is an arithmetic number, because the mean of its divisors is an integer number (834581571).

Almost surely, 2^1669163141 is an apocalyptic number.

It is an amenable number.

1669163141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669163141 is an equidigital number, since it uses as much as digits as its factorization.

1669163141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 1669163141 is about 40855.3930466958. The cubic root of 1669163141 is about 1186.2227856928. Note that the first 3 decimals are identical.

The spelling of 1669163141 in words is "one billion, six hundred sixty-nine million, one hundred sixty-three thousand, one hundred forty-one".