1800494453 has 2 divisors, whose sum is σ = 1800494454. Its totient is φ = 1800494452.

The previous prime is 1800494401. The next prime is 1800494569. The reversal of 1800494453 is 3544940081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1549367044 + 251127409 = 39362^2 + 15847^2 .

It is a cyclic number.

It is not a de Polignac number, because 1800494453 - 2⁸ = 1800494197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1800494053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900247226 + 900247227.

It is an arithmetic number, because the mean of its divisors is an integer number (900247227).

Almost surely, 2^1800494453 is an apocalyptic number.

It is an amenable number.

1800494453 is a deficient number, since it is larger than the sum of its proper divisors (1).

1800494453 is an equidigital number, since it uses as much as digits as its factorization.

1800494453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 1800494453 is about 42432.2336555595. The cubic root of 1800494453 is about 1216.5517727330.

The spelling of 1800494453 in words is "one billion, eight hundred million, four hundred ninety-four thousand, four hundred fifty-three".