1803531073 has 2 divisors, whose sum is σ = 1803531074. Its totient is φ = 1803531072.

The previous prime is 1803531031. The next prime is 1803531089. The reversal of 1803531073 is 3701353081.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1803531024 + 49 = 42468^2 + 7^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1803531073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1803531473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 901765536 + 901765537.

It is an arithmetic number, because the mean of its divisors is an integer number (901765537).

Almost surely, 2^1803531073 is an apocalyptic number.

It is an amenable number.

1803531073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1803531073 is an equidigital number, since it uses as much as digits as its factorization.

1803531073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 1803531073 is about 42468.0005769050. Note that the first 3 decimals coincide. The cubic root of 1803531073 is about 1217.2353128505.

The spelling of 1803531073 in words is "one billion, eight hundred three million, five hundred thirty-one thousand, seventy-three".