1803398941 has 4 divisors (see below), whose sum is σ = 1804482432. Its totient is φ = 1802315452.

The previous prime is 1803398939. The next prime is 1803398963. The reversal of 1803398941 is 1498933081.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1803398941 - 2¹ = 1803398939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1803398891 and 1803398900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1803398921) 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, 539245 + ... + 542578.

It is an arithmetic number, because the mean of its divisors is an integer number (451120608).

Almost surely, 2^1803398941 is an apocalyptic number.

It is an amenable number.

1803398941 is a deficient number, since it is larger than the sum of its proper divisors (1083491).

1803398941 is a wasteful number, since it uses less digits than its factorization.

1803398941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083490.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 1803398941 is about 42466.4448829897. Note that the first 3 decimals coincide. The cubic root of 1803398941 is about 1217.2055860428.

The spelling of 1803398941 in words is "one billion, eight hundred three million, three hundred ninety-eight thousand, nine hundred forty-one".