1823320909 has 2 divisors, whose sum is σ = 1823320910. Its totient is φ = 1823320908.

The previous prime is 1823320903. The next prime is 1823320937. The reversal of 1823320909 is 9090233281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1202563684 + 620757225 = 34678^2 + 24915^2 .

It is an emirp because it is prime and its reverse (9090233281) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1823320909 - 2³ = 1823320901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1823320901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 911660454 + 911660455.

It is an arithmetic number, because the mean of its divisors is an integer number (911660455).

Almost surely, 2^1823320909 is an apocalyptic number.

It is an amenable number.

1823320909 is a deficient number, since it is larger than the sum of its proper divisors (1).

1823320909 is an equidigital number, since it uses as much as digits as its factorization.

1823320909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 1823320909 is about 42700.3619305504. The cubic root of 1823320909 is about 1221.6712982802.

The spelling of 1823320909 in words is "one billion, eight hundred twenty-three million, three hundred twenty thousand, nine hundred nine".