1828216469 has 2 divisors, whose sum is σ = 1828216470. Its totient is φ = 1828216468.

The previous prime is 1828216457. The next prime is 1828216477. The reversal of 1828216469 is 9646128281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1220593969 + 607622500 = 34937^2 + 24650^2 .

It is an emirp because it is prime and its reverse (9646128281) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1828216469 is a prime.

It is a super-2 number, since 2×1828216469² = 6684750915045655922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1821216469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 914108234 + 914108235.

It is an arithmetic number, because the mean of its divisors is an integer number (914108235).

Almost surely, 2^1828216469 is an apocalyptic number.

It is an amenable number.

1828216469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1828216469 is an equidigital number, since it uses as much as digits as its factorization.

1828216469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 47.

The square root of 1828216469 is about 42757.6480761045. The cubic root of 1828216469 is about 1222.7637043324.

The spelling of 1828216469 in words is "one billion, eight hundred twenty-eight million, two hundred sixteen thousand, four hundred sixty-nine".