1808713 has 2 divisors, whose sum is σ = 1808714. Its totient is φ = 1808712.

The previous prime is 1808707. The next prime is 1808761. The reversal of 1808713 is 3178081.

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., 1658944 + 149769 = 1288^2 + 387^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1808713 is a prime.

1808713 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1808773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 904356 + 904357.

It is an arithmetic number, because the mean of its divisors is an integer number (904357).

2^1808713 is an apocalyptic number.

It is an amenable number.

1808713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1808713 is an equidigital number, since it uses as much as digits as its factorization.

1808713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1808713 is about 1344.8840098685. The cubic root of 1808713 is about 121.8399989782.

The spelling of 1808713 in words is "one million, eight hundred eight thousand, seven hundred thirteen".