1805340773 has 2 divisors, whose sum is σ = 1805340774. Its totient is φ = 1805340772.

The previous prime is 1805340763. The next prime is 1805340781. The reversal of 1805340773 is 3770435081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1066479649 + 738861124 = 32657^2 + 27182^2 .

It is a cyclic number.

It is not a de Polignac number, because 1805340773 - 2⁶ = 1805340709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1805340743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902670386 + 902670387.

It is an arithmetic number, because the mean of its divisors is an integer number (902670387).

Almost surely, 2^1805340773 is an apocalyptic number.

It is an amenable number.

1805340773 is a deficient number, since it is larger than the sum of its proper divisors (1).

1805340773 is an equidigital number, since it uses as much as digits as its factorization.

1805340773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 1805340773 is about 42489.3018652931. The cubic root of 1805340773 is about 1217.6423096951.

The spelling of 1805340773 in words is "one billion, eight hundred five million, three hundred forty thousand, seven hundred seventy-three".