1794803981 has 2 divisors, whose sum is σ = 1794803982. Its totient is φ = 1794803980.

The previous prime is 1794803963. The next prime is 1794804071. The reversal of 1794803981 is 1893084971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1374184900 + 420619081 = 37070^2 + 20509^2 .

It is an emirp because it is prime and its reverse (1893084971) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1794803981 is a prime.

It is a super-4 number, since 4×1794803981⁴ (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1794803911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 897401990 + 897401991.

It is an arithmetic number, because the mean of its divisors is an integer number (897401991).

Almost surely, 2^1794803981 is an apocalyptic number.

It is an amenable number.

1794803981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1794803981 is an equidigital number, since it uses as much as digits as its factorization.

1794803981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 1794803981 is about 42365.1269442215. The cubic root of 1794803981 is about 1215.2687807650.

The spelling of 1794803981 in words is "one billion, seven hundred ninety-four million, eight hundred three thousand, nine hundred eighty-one".