3781954849 has 2 divisors, whose sum is σ = 3781954850. Its totient is φ = 3781954848.

The previous prime is 3781954823. The next prime is 3781954871. The reversal of 3781954849 is 9484591873.

3781954849 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3088580625 + 693374224 = 55575^2 + 26332^2 .

It is a cyclic number.

It is not a de Polignac number, because 3781954849 - 2⁵ = 3781954817 is a prime.

It is a super-2 number, since 2×3781954849² = 28606364959749225602, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3781954793 and 3781954802.

It is not a weakly prime, because it can be changed into another prime (3781954879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1890977424 + 1890977425.

It is an arithmetic number, because the mean of its divisors is an integer number (1890977425).

Almost surely, 2^3781954849 is an apocalyptic number.

It is an amenable number.

3781954849 is a deficient number, since it is larger than the sum of its proper divisors (1).

3781954849 is an equidigital number, since it uses as much as digits as its factorization.

3781954849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 58.

The square root of 3781954849 is about 61497.6003515584. The cubic root of 3781954849 is about 1558.0167171321.

The spelling of 3781954849 in words is "three billion, seven hundred eighty-one million, nine hundred fifty-four thousand, eight hundred forty-nine".