1800934453 has 4 divisors (see below), whose sum is σ = 1801149228. Its totient is φ = 1800719680.

The previous prime is 1800934451. The next prime is 1800934469. The reversal of 1800934453 is 3544390081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1007554564 + 793379889 = 31742^2 + 28167^2 .

It is a cyclic number.

It is not a de Polignac number, because 1800934453 - 2¹ = 1800934451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1800934451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94276 + ... + 111757.

It is an arithmetic number, because the mean of its divisors is an integer number (450287307).

Almost surely, 2^1800934453 is an apocalyptic number.

It is an amenable number.

1800934453 is a deficient number, since it is larger than the sum of its proper divisors (214775).

1800934453 is an equidigital number, since it uses as much as digits as its factorization.

1800934453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214774.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1800934453 is about 42437.4180765041. The cubic root of 1800934453 is about 1216.6508638801.

The spelling of 1800934453 in words is "one billion, eight hundred million, nine hundred thirty-four thousand, four hundred fifty-three".