3683787649 has 2 divisors, whose sum is σ = 3683787650. Its totient is φ = 3683787648.

The previous prime is 3683787641. The next prime is 3683787671. The reversal of 3683787649 is 9467873863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2896592400 + 787195249 = 53820^2 + 28057^2 .

It is a cyclic number.

It is not a de Polignac number, because 3683787649 - 2³ = 3683787641 is a prime.

It is not a weakly prime, because it can be changed into another prime (3683787641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1841893824 + 1841893825.

It is an arithmetic number, because the mean of its divisors is an integer number (1841893825).

Almost surely, 2^3683787649 is an apocalyptic number.

It is an amenable number.

3683787649 is a deficient number, since it is larger than the sum of its proper divisors (1).

3683787649 is an equidigital number, since it uses as much as digits as its factorization.

3683787649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36578304, while the sum is 61.

The square root of 3683787649 is about 60694.2142959277. The cubic root of 3683787649 is about 1544.4180279305.

The spelling of 3683787649 in words is "three billion, six hundred eighty-three million, seven hundred eighty-seven thousand, six hundred forty-nine".