1808597449 has 2 divisors, whose sum is σ = 1808597450. Its totient is φ = 1808597448.

The previous prime is 1808597447. The next prime is 1808597489. The reversal of 1808597449 is 9447958081.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1481711049 + 326886400 = 38493^2 + 18080^2 .

It is an emirp because it is prime and its reverse (9447958081) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1808597449 - 2¹ = 1808597447 is a prime.

Together with 1808597447, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1808597449.

It is not a weakly prime, because it can be changed into another prime (1808597447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 904298724 + 904298725.

It is an arithmetic number, because the mean of its divisors is an integer number (904298725).

Almost surely, 2^1808597449 is an apocalyptic number.

It is an amenable number.

1808597449 is a deficient number, since it is larger than the sum of its proper divisors (1).

1808597449 is an equidigital number, since it uses as much as digits as its factorization.

1808597449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 55.

The square root of 1808597449 is about 42527.6080799285. The cubic root of 1808597449 is about 1218.3740430945.

The spelling of 1808597449 in words is "one billion, eight hundred eight million, five hundred ninety-seven thousand, four hundred forty-nine".