1804783949 has 2 divisors, whose sum is σ = 1804783950. Its totient is φ = 1804783948.

The previous prime is 1804783909. The next prime is 1804784011. The reversal of 1804783949 is 9493874081.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1773925924 + 30858025 = 42118^2 + 5555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1804783949 - 2¹² = 1804779853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1804783949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1804783909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902391974 + 902391975.

It is an arithmetic number, because the mean of its divisors is an integer number (902391975).

Almost surely, 2^1804783949 is an apocalyptic number.

It is an amenable number.

1804783949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1804783949 is an equidigital number, since it uses as much as digits as its factorization.

1804783949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The square root of 1804783949 is about 42482.7488399703. The cubic root of 1804783949 is about 1217.5171103993.

The spelling of 1804783949 in words is "one billion, eight hundred four million, seven hundred eighty-three thousand, nine hundred forty-nine".