1824945809 has 2 divisors, whose sum is σ = 1824945810. Its totient is φ = 1824945808.

The previous prime is 1824945791. The next prime is 1824945841. The reversal of 1824945809 is 9085494281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1146499600 + 678446209 = 33860^2 + 26047^2 .

It is a cyclic number.

It is not a de Polignac number, because 1824945809 - 2²⁰ = 1823897233 is a prime.

It is not a weakly prime, because it can be changed into another prime (1824945209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 912472904 + 912472905.

It is an arithmetic number, because the mean of its divisors is an integer number (912472905).

Almost surely, 2^1824945809 is an apocalyptic number.

It is an amenable number.

1824945809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1824945809 is an equidigital number, since it uses as much as digits as its factorization.

1824945809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 50.

The square root of 1824945809 is about 42719.3844641985. The cubic root of 1824945809 is about 1222.0340986125.

The spelling of 1824945809 in words is "one billion, eight hundred twenty-four million, nine hundred forty-five thousand, eight hundred nine".